Best AI Search Engines, Scored: Four of Eight Print a Price

The best AI search engine depends on the question: Perplexity for research you’ll have to cite, Google AI Mode for local facts and fast lookups, ChatGPT for everyday questions, Copilot if your work lives in Microsoft 365, Kagi if you want ads out of your results, Brave or Duck.ai if you’d rather not log in, and Grok for what X is saying right now. Only four of the eight print a plain monthly price.

Updated August 2026. Every price below was read off the vendor’s own page and carries the date we last saw it — most re-read on August 12, 2026, Perplexity’s and ChatGPT’s on August 5, Grok’s on July 30. Where a vendor publishes no price, we say so instead of guessing.

The best AI search engines at a glance

Scores are our judgment on documented evidence, not a lab benchmark. All eight are free at the point of use, so the decision turns on three other questions: what does it cite, does it make you log in, and what happens to your prompt. Academic paper search is a different job, scored on our AI research assistants hub.

One name that belongs on lists like this isn’t here: You.com. Its pricing page is now entirely API rates sold by the thousand calls, with no consumer plan on it (checked Aug 5, 2026) — the company sells search to agents now, whatever the listicles still say. We’ll score it again when there’s a consumer product to score.

Four of eight will tell you what it costs

Kagi shows a number before you do anything: $5 a month for 300 searches, $10 for unlimited, $25 for Research mode and the flagship models (verified Aug 12, 2026).

Brave shows one too, though it takes finding. Search premium is $3.00 a month or $29.99 a year to strip ads out of your results (verified Aug 12, 2026) — the cheapest paid tier here. But Brave’s own help centre discusses Premium without naming a figure, and brave.com/search/premium/, the URL that circulates in write-ups and the one we tried first, is a 404. The price lives at brave.com/premium.

Microsoft is the fourth, and the plainest of the lot: $9.99 a month for Microsoft 365 Personal, $12.99 for Family, $19.99 for Premium, with the yearly equivalents printed beside them at $99.99, $129.99 and $199.99 (verified Aug 12, 2026). Read the small print before you cheer, though. What that buys is Office with Copilot inside it, the AI features work only for the account that pays, and Copilot’s own search — the thing this page is about — was already free.

Perplexity shows a number with a condition attached: $17 a month for Pro, $167 for Max, both stamped “when billed annually” (verified Aug 5, 2026). The straight monthly figure isn’t on the card, and perplexity.ai/pricing returns a 404. Its help centre is forthcoming about every plan except the one it wants to sell you — Max at $200 a month, Education Pro at $10, Enterprise Pro from $40 a seat, and silence on what Pro costs monthly.

Then it gets strange. OpenAI’s pricing page has no price in it: the HTML ships the price element empty and fills it from wherever you happen to be sitting. Ours resolved through a Polish exit node and quoted PLN 34.99, PLN 99.99 and from PLN 439. Google does the identical thing, and in the same złoty: run its AI plans page through a browser rather than a crawler and the tiers fill in as 23,99 zł, 97,99 zł and from 469,99 zł a month, with a fourth column at 979,99 zł for the 20x Ultra plan (verified Aug 12, 2026). And xAI invites you to upgrade to SuperGrok without saying what it costs.

Nobody here is hiding a price behind a sales call. They’re hiding it behind your IP address and a free tier generous enough that you stop asking. Every listicle quotes “$20 a month” for these tools. Almost none says which country’s $20 — and none of them mentions that Kagi and Brave quoted us dollars from the same Polish connection that turned OpenAI’s and Google’s pages into złoty. Microsoft’s figures came in dollars too, but it’s the weaker piece of evidence: we read them off a /en-us/ URL, which is Microsoft answering the question we asked rather than ignoring where we were.

How we scored this (and what we didn’t do)

We did not run a benchmark. Anyone claiming to have ranked eight answer engines by accuracy owes you a method, and most pages on this SERP haven’t got one.

What we did: opened all eight vendors’ pricing, plan and help pages, recording the four dead pricing URLs and the empty price fields as we went; read Google’s, Microsoft’s and DuckDuckGo’s own documentation on their limits; pulled the live SERP twice, six days apart; and read three Reddit threads comment by comment, including the one arguing this whole category is overrated. Then we went back. Prices were re-read on August 5, 6 and 12, 2026, and every time one had moved or we’d misread it, the correction went in the changelog with its date. Grok’s page we have not reopened since July 30. Its row carries that date rather than a fresher-looking one.

The tie-breaker documents can’t settle is answer quality on a question with a checkable answer. That needs an artifact we haven’t captured.

Ratings are ours. No vendor saw a draft, and nobody on this page paid to be on it.

Best for research you’ll have to cite: Perplexity

Perplexity is the pick when an answer has to survive someone else reading it. Its cards sell depth over speed: model choice across Claude Sonnet 5, Gemini 3.1 Pro and its own Sonar 2, plus sourcing that reaches past the open web into licensed material including Pitchbook and Wiley (verified Aug 5, 2026). You can’t cite what the crawler never saw.

Try it free first, but know what free means here: three Pro Searches a day and one Research query a month (verified Aug 5, 2026). That’s a demo, not a plan. And the pricing is the slippery part — that $17 is the annual rate wearing monthly clothes, /pricing 404s, and the cards lead with bonus “Computer credits” rather than with what the subscription does.

Skip it if your searches are mostly “what time does this close”. You’d be paying for a research instrument to look up a phone number, and Google AI Mode does that free.

Best for local facts and fast lookups: Google AI Mode

AI Mode’s advantage is unglamorous and hard to beat: it already lives inside the box you type into, it’s free, and it needs no subscription (verified Aug 12, 2026). Underneath it runs what Google calls query fan-out, breaking your question into subtopics and searching all of them at once.

Two catches, both from Google’s own help page. The good model is rationed: Gemini 3 Pro inside AI Mode carries daily usage limits, and when you hit them you wait or buy a Google AI plan. Personalisation also reaches into your search history and, with permission, Gmail, Calendar and Photos.

Skip it if you’re comparing options rather than looking something up. AI Mode retrieves a fact superbly and holds an argument across ten sources merely competently.

Best for everyday questions: ChatGPT Search

The strongest thing about ChatGPT Search is that it isn’t a separate purchase or a separate tab. OpenAI’s plan comparison lists Search on Free, Go, Plus and Pro alike (verified Aug 5, 2026), so if ChatGPT is open you already have this, and the upsell is about message limits, not search.

The same comparison table, read the same day, shows what you’re actually buying as you climb: 27K of context on the free instant model, 54K on Go and Plus, 128K on Pro, and deep research that only works properly once you pay. What those tiers cost we can’t tell you, because OpenAI’s page can’t either until it knows where you are.

Skip it if you need to see the citation before you trust the sentence. ChatGPT searches, but it presents like a conversation, and conversations are very good at sounding finished.

Best for work that lives in Microsoft 365: Microsoft Copilot

Copilot is the one on this page you may already be paying for without noticing. The free version at copilot.microsoft.com costs nothing, doesn’t ask you to sign in, and gives what Microsoft’s own support page calls “real-time answers based on web search” (verified Aug 12, 2026). Signing in adds chat history, image creation and longer conversations. Nothing about that is unusual in 2026 — what’s unusual is where it goes next.

Pay, and Copilot stops being a website. Microsoft 365 Personal is $9.99 a month or $99.99 a year, Family $12.99 or $129.99, Premium $19.99 or $199.99 (verified Aug 12, 2026), and the thing you’re buying is Copilot inside Word, Excel, PowerPoint and Outlook, plus the Researcher and Analyst agents on Premium. It is the only engine here whose upgrade path leads out of the browser.

Two things the pricing page tells you quietly. AI features belong to the subscription owner alone and can’t be shared, even on the Family plan built for six people. And usage runs on “AI credits” whose counts live behind another link rather than on the price card.

Skip it if your documents don’t live in Microsoft 365. Strip out Word and Excel and you’re left with a competent free chat assistant, which is what Duck.ai gives you without an account and Google gives you inside the search box.

Best if you want the ads gone: Kagi

Kagi has no advertiser to keep happy because it has no advertiser. Its users fund it, and it shows in the one place that matters: the pricing page quotes the same figures whatever country you load it from. Brave’s does too. OpenAI’s does not.

Its tiers sell searches, not features: 100 free to try, 300 for $5, unlimited for $10, and $25 for Ultimate, which is where Research mode and the flagship models live. Annual billing takes 10% off, every figure carries a ”+ Sales Tax” note rather than burying it at checkout, and a month you don’t use gets credited back (verified Aug 12, 2026, unchanged since July).

Skip it if $10 a month for search strikes you as absurd. That’s defensible, and the free tiers at Google and DuckDuckGo are good. Kagi earns its money only if ad-shaped results cost you time.

Best for AI answers without an account: Duck.ai

Duck.ai suits anyone who wants a model without a relationship. It fronts other companies’ models, Claude 4.5 Haiku, Mistral Small 4, GPT-5.4 nano and mini, gpt-oss-120b and Gemma 4 31B, anonymising your prompts on the way through (re-verified Aug 12, 2026). Recent chats sit on your device, and DuckDuckGo is the only vendor here that says it won’t store prompts or train on them.

It does one more thing none of the others will: it lets you turn AI off, via a settings toggle, a help page titled “Opting Out of AI Features”, and a whole hostname, noai.duckduckgo.com.

The paid ladder is the one thing it describes precisely and prices not at all. Subscribers on the Plus plan get GPT-5.4 and Claude Sonnet 4.6; Pro adds Claude Opus 4.8, higher reasoning effort and twice Plus’s usage limits (re-verified Aug 12, 2026). DuckDuckGo will tell you exactly which models your money buys and never what it costs.

Skip it if you want an engine that plans multi-step research. Duck.ai is a private front door to chat models, not an agent, and it doesn’t pretend to be one.

Best for no login, and its own crawler: Brave Search

Brave earns its place on friction. In the thread below, one user’s entire reason for choosing it was “login is not required”, and on a SERP where half the field gates you at the door, that counts as a feature.

Brave Search is free and carries paid ads; Premium removes them for $3.00 a month or $29.99 a year, and Leo, the browser-side assistant, runs $14.99 a month (verified Aug 12, 2026). That makes Brave the cheapest way to buy ad-free results anywhere on this page. It took us two attempts to find out: Brave’s help centre discusses Premium without naming a figure, and the price sits on a marketing page most write-ups don’t link. One asterisk on the independence: Brave’s help centre also carries an article titled “Google fallback mixing”, which we flagged rather than read.

Skip it if you want the AI layer to be the main event. Brave is a search engine with AI attached; Perplexity and Duck.ai are the reverse.

Best for what X is saying right now: Grok

Grok has one genuine edge and it isn’t the model. It searches X live alongside the web, citing both, so on a breaking story or a market rumour it reads a room the other six can’t see into (verified Jul 30, 2026). One Redditor’s search-shaped use of it was exactly that narrow: “finding x accounts”. The only other thing he used Grok for was making pictures.

It sits last on transparency rather than capability. The x.ai product page invites you to upgrade to SuperGrok for higher limits and multi-agent reasoning, and never says what that costs. The only pricing link in its navigation goes to developer API rates.

Skip it if your questions don’t touch X. Strip out the live social layer and you have a competent general assistant among competent general assistants.

The best AI search engines for research, ranked by what they cite

Three of these are built for research, and they disagree about what a source even is. For Perplexity the unit of evidence is a URL, and it pays for access to material the open web doesn’t carry. Google AI Mode counts its own index as the evidence, showing you sources as a courtesy on the way to ending your search.

Kagi is the odd one out. Its Research mode treats an ad-free result set as the evidence, which sounds like a small distinction until the thing you’re researching is a product somebody advertises against. Copilot sells a Researcher agent as well, but Microsoft locks it to the Microsoft 365 Premium plan rather than to the free engine (verified Aug 12, 2026), so it isn’t competing for this job at the same price.

So pick by what you’ll have to defend. A brief someone else will check wants Perplexity. Use free Google for the fact you need before a meeting. And when money rides on the ranking, pay for Kagi. Academic papers are a fourth job with a fourth answer, scored on the research assistants hub.

What Reddit actually uses

The most useful non-vendor discussion we found sits in a neutral subreddit, not a fan one: Which AI-powered search engine do you use the most?, posted 31 January 2026: 10 comments and about 6 points at 80% upvoted (read again Aug 12, 2026). Treat the score as noise — it showed 5 points at 78% on August 5 and is back at 6 and 80% now, which is Reddit fuzzing votes rather than ten people changing their minds. The comments are the evidence, and there are only ten of them.

Nobody in it uses one engine. They rotate, and they split by job rather than by ranking. “I rotate between chatgpt and Perplexity, mostly for research or perplexity for quick lookups,” says the top reply. Another uses ChatGPT for work rotas, Perplexity for web searches, and “grok for finding x accounts”.

Then the pattern that matters. “I use Brave, because login is not required.” “I use deepseek, when u need to ask simething private i use duckduckgo because you can use private mode.” Three of the ten comments name login or privacy as the reason for the pick, the third from someone who is simply “not a big fan of signing up for these sites”. Not one names answer quality.

Read it with your guard up: the top-voted reply answers in two sentences, then pivots into an unprompted pitch for something called Nova Search AI, which nobody asked about.

The counter-current matters more than the picks. Among the threads r/searchengines surfaced beside this one on July 30, two were people asking for a search engine with no AI in it at all, one because “the AI mode is always on”. A third announced Presearch had shut down. Re-reading the thread on August 5 turned up a fresh one in the same rail: somebody hunting “a reverse image search platform that works and doesn’t have an AI chat bot attached”. We read all of these as titles, not threads. The keyword data agrees: “non ai search engines” pulls 1,000 searches a month.

The case against all of this

The sharpest dissent is an r/artificial thread from November 2025, 20 points at 78% upvoted, 25 comments (counts read Aug 5, 2026). The poster used Perplexity daily for a month and came away hostile: “All I see is a product that is surviving on two things: hype and human cognitive incompetence.”

The replies are better than the post. One commenter reframes the category in two sentences: “Perplexity is essentially doing Google searches for people. The question is, is Perplexity better at using Google than a person is? If not, then using Perplexity will yield poor search results.” Another argues the same model performs measurably better hit directly than through the search product’s wrapper — “a product problem not a model problem”.

The most instructive comment comes from a defender, who rates Perplexity well above Google but only “AS LONG AS I remind it in every prompt to search first and provide high quality references. I literally have that reminder pinned to my clipboard.” When the best case for an answer engine needs a pinned clipboard reminder, that belongs in the buying decision.

Guard up here too. Logged out, old.reddit shows each comment’s score as a three-number spread rather than a figure, and almost every reply in this thread sits at a single point. There’s no vote-weighting to lean on, and we’ve claimed none.

Nobody independent is ranking these

We pulled the SERP on July 30, 2026, and again on August 5. Nothing moved. The AI Overview fires, names Perplexity, ChatGPT Search, Google AI Mode, Consensus and Microsoft Copilot, and gives each a one-line “best for” with a price inline. That is the shape this page is built in.

The organic results are funnier. Number one for “best ai search engine” is VirtualPBX, a VoIP vendor, with a post titled “I Compared 10 AI Search Engines”. Slack ranks its own Slack AI Search at seven. Between them sit Reddit twice, Zapier, PCMag and an SEO agency: one real technology publisher, one aggregator, two forum threads, and companies that sell something else. PCMag’s snippet crowns a free engine called Komi, a name that appears nowhere else on page one and which we have not verified.

The Overview’s twelve reference slots tell the same story — two to PCMag, two to Zapier, two to the phone company, the rest to a YouTube video, three agency blogs, Slack and NordVPN. The Reddit thread ranked third is a January 2025 self-post in which the author links their own article; it holds 3 points at 58% upvoted, and two of its three substantive replies argue with the premise.

This isn’t a defended SERP. It’s a category nobody has bothered to referee. If you care about the other half of it — how to get cited by these engines rather than which to use — that’s our AI visibility and GEO tools hub, with real costs on the GEO pricing index.

FAQ

What is an AI search engine?

An AI search engine answers your question in prose with linked sources, instead of returning ten blue links to sift. It searches the live web, reads what it finds, and synthesises one response you can ask follow-ups about. Perplexity, Google AI Mode and ChatGPT Search lead the field.

Which AI search engine is best in 2026?

It depends on the question. Perplexity for research you’ll have to cite, Google AI Mode for local facts, ChatGPT Search for everyday questions, Copilot if your work lives in Microsoft 365, Kagi if you want ads out of your results, Duck.ai or Brave if you’d rather not log in, Grok for X.

Is there a genuinely free AI search engine?

Several, and they’re the default. Google AI Mode is free with no subscription. Duck.ai and Microsoft Copilot are free and need no account (verified Aug 12, 2026). Brave is free with ads, Kagi gives 100 free searches, and ChatGPT’s search runs on its free plan (verified Aug 5, 2026). Perplexity’s free tier is three Pro Searches a day.

How much does Perplexity Pro cost?

Perplexity’s cards show Pro at $17 a month and Max at $167, both billed annually (verified Aug 5, 2026). The straight monthly prices aren’t on the card, and perplexity.ai/pricing returns a 404. Its help centre names Max at $200 a month, Education Pro at $10 and Enterprise Pro from $40 a seat — but never Pro monthly.

What is the cheapest AI search engine you can pay for?

Brave, at $3.00 a month or $29.99 a year, which buys ad-free results rather than better reasoning (verified Aug 12, 2026). Kagi’s entry tier is $5 a month for 300 searches and Microsoft 365 Personal is $9.99. Above that it jumps to roughly $17, and the free tiers at Google, DuckDuckGo and ChatGPT cost nothing.

Can AI search engines be trusted for facts?

Only with checking, and Google says so itself. Its AI Mode help page warns the feature “may misinterpret web content or miss context” and tells you to “always check important info in more than one place”. Open the citations before trusting the answer.

Will AI search replace Google?

Google is the largest AI search engine, so the framing is stale. The real shift is that answers arrive without a click: a problem for publishers rather than searchers, and the reason tracking your visibility inside these engines became its own discipline.

Changelog

• 2026-08-12 — QA pass on the August 6 changes, plus one addition that changes the headline. Added: Microsoft Copilot, as an eighth engine. We left it off on August 6 because both of Microsoft’s documented consumer pricing URLs returned 404 and we won’t score what we can’t price. Both still 404 — but the live page is elsewhere, at microsoft.com/en-us/microsoft-365-copilot/pricing/individuals, and it quotes plain dollars: Microsoft 365 Personal $9.99 a month or $99.99 a year, Family $12.99 or $129.99, Premium $19.99 or $199.99. Copilot itself is free with no sign-in required. So the reason for the omission was wrong, and the count in the title moved with it: three of seven became four of eight. The table, answer block, pricing section, FAQ and schema were rewritten to match. Re-verified live, all unchanged: Kagi’s four tiers with the sales-tax note and the credit-back clause; Brave Search premium at $3.00/$29.99 and Leo at $14.99/$149.99; Duck.ai’s free model list and its priceless paid ladder; Google’s AI plans still rendering 23,99 zł, 97,99 zł and from 469,99 zł to our connection with no dollar figure anywhere. Closed: Google’s AI Mode help page, which had carried a July 30 stamp since drafting, was re-read and confirmed line by line — query fan-out, the Gemini 3 Pro daily limit, the upgrade path and both quoted warnings. Grok is now the only row on this page older than a week, and it says so. Added: one sentence naming You.com as a deliberate omission, since its pricing page sells API calls and no longer sells a consumer product.
• 2026-08-06 — Verification pass; one correction, one gap partly closed, one gap opened. Correction: we previously reported that Google’s AI plans page rendered its price row blank. It doesn’t — that was an artefact of fetching the page without JavaScript. Loaded in a browser, the tiers fill in as 23,99 zł, 97,99 zł and from 469,99 zł a month, keyed to our location exactly as OpenAI’s do. The mechanism is the same on both, which makes this page’s central point stronger, not weaker, and the pricing section now says so. Closed: Duck.ai was re-fetched, its free model list confirmed unchanged, and its paid ladder added — Plus brings GPT-5.4 and Claude Sonnet 4.6, Pro adds Claude Opus 4.8, higher reasoning effort and double the usage limits, with neither plan’s price stated anywhere on the page. Kagi’s and Brave’s prices were re-read a third time and are unchanged; both again quoted dollars through the same non-US connection that turned OpenAI’s and Google’s pages into local currency. Opened: Microsoft Copilot is named by Google’s own AI Overview as the pick for Microsoft 365 work and isn’t on this roster. Both of Microsoft’s documented consumer pricing URLs return 404, so no figure could be verified and nothing was added; it is now logged as a decision to make before publish rather than a silent omission. Consensus was re-probed and its pricing page still renders no figures, which means the numbers recorded in July could not be reproduced. Grok and Google’s AI Mode help page keep their July 30 stamps.
• 2026-08-05 — QA and humanization pass. Kagi’s and Brave’s prices were re-fetched from the vendors’ own pages and both confirmed unchanged. Both Reddit threads were re-opened and every quote checked against the live page; the vote counts had drifted since drafting and are corrected here (the r/searchengines thread now reads 5 points at 78%, the r/artificial thread 20 points at 78%). One internal contradiction fixed: the Kagi section still called Kagi the only engine that publishes a plain price, which stopped being true when we corrected the Brave finding. Added: Kagi’s ”+ Sales Tax” line, the fact that both Kagi’s and Brave’s prices render in dollars from outside the US where OpenAI’s do not, and one more no-AI-search request found in r/searchengines on the day.
• 2026-08-05 — Verification pass; one correction and one resolved gap. Correction: Brave does publish a Search premium price, $3.00/month or $29.99/year, at brave.com/premium. Our July draft checked Brave’s help centre, which names no figure, and wrongly reported the price as unpublished. Headline count moved from two of seven to three of seven; the table, the pricing section and the Brave section were rewritten. Also recorded: brave.com/search/premium/ returns 404. Resolved: the keyword figures, flagged in July as suggestions-only after keyword_overview was rate-limited, were re-pulled via keyword_overview. Difficulty had been understated by roughly half across the cluster (primary SD 20 → 41, head SD 33 → 69), CPC understated by more than half ($2.91 → $6.57); primary target survives unchanged, and the free-intent spoke was re-sized after its 2,400 headline proved to be a one-month spike against a ~720 baseline. Added: Perplexity’s wider ladder from its own help centre (Max $200/mo or $2,000/yr, Education Pro $10/mo, Enterprise Pro from $40/seat/mo) and its free-tier limits (3 Pro Searches/day, 1 Research query/month); an r/artificial dissent section; the AI Overview’s twelve reference slots; a research-intent section. SERP re-pulled six days on — unchanged, still no independent ranked comparison on page one. Kagi’s prices re-checked and unchanged. Duck.ai, Grok and Google’s AI Mode help page were NOT re-checked this pass and keep their July 30 stamps.
• 2026-07-30 — Page created. Seven engines scored, every price read live on the vendor’s own page. Kagi ($5/$10/$25 plus the credit-back clause) and Perplexity ($17 and $167 a month billed annually) publish figures; Google AI Mode and Duck.ai are free; Brave Premium, SuperGrok and every paid ChatGPT tier publish no price on the pages read, OpenAI’s price element shipping empty and filling client-side. SERP recorded: organic #1 a VoIP vendor, #7 Slack ranking itself, #8 a VPN company. Primary keyword set from scratch: “best ai search engine”, 1,600/mo, SD 20, $2.91 CPC.

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Independent, no paid placements. We verify every price on the vendor’s own site and stamp the date; we publish who should skip each tool; we keep this changelog public. See how we score AI tools and our independence charter. More categories on the AI tools index, every verified price on the pricing index. Related: AI visibility and GEO tools, AI research assistants, and the context engineering course if you’d rather be the source these engines quote.