Side-by-side comparison · Research & Search
ChatGPT Deep Research vs Exa vs Kagi
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: ChatGPT users who want a proper write-up on a question and are happy to wait a few minutes for it.
Pick it if: People using Claude Code or building their own assistants who want real web search behind them.
Pick it if: People who search all day for work and are tired of ads and spammy results.
Kagi scores highest overall, but Exa gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | ChatGPT Deep Research | Exa | Kagi |
|---|---|---|---|
| In one line | ChatGPT's research mode, which browses for you and writes up a cited report. | A search engine built for AI tools, so Claude can find exactly the pages it needs. | A paid search engine with no ads or tracking, plus an AI assistant that cites sources. |
| Pricing model | Freemium | Freemium | Paid |
| Starting price | $8/mo | From $4 per 1 | $5/mo |
| Free plan | Yes | Yes | No |
| Works with Claude Code | No | Yes | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | ChatGPT Deep Research | Exa | Kagi |
|---|---|---|---|
| Overall rating | 3.8 | 4.0 | 4.3Winner |
| Ease of useHow quickly someone non-technical gets value from it. | 4.0 | 3.0 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.0 | 4.0 | 4.5 |
| Output qualityHow good the results are before you fix them. | 4.5 | 4.0 | 4.5 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 4.5 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 3.0 | 4.5 | 4.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | ChatGPT Deep Research | Exa | Kagi |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | No |
| Mobile app | Yes | No | Yes |
| Desktop app | Yes | No | No |
| Browser extension | Yes | No | Yes |
| API access | Yes | Yes | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | No |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | Yes | No | Yes |
| Understands images | Yes | No | Yes |
| Makes images | Yes | No | No |
| Makes video | Yes | No | No |
| Writes code | Yes | No | Yes |
| Runs agents or automations | Yes | Yes | No |
| Learns your brand or style | Yes | No | – |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 16/ 17 | 7/ 17 | 9/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | ChatGPT Deep Research | Exa | Kagi |
|---|---|---|---|
| Plans | Free Free Seeing what a report looks like. | FreeOur pick Free Personal use inside Claude Code. | Trial Free Seeing the difference. |
Go $8/mo Casual users who want more chat, not more research. | Pay as you go From $4 per 1,000 searches Anyone whose usage outgrows the free credit. | Starter $5/mo Light searchers. | |
PlusOur pick $20/mo Anyone who wants deep research weekly. | Enterprise Custom Companies building products on top of it. | ProfessionalOur pick $10/mo Anyone who searches every day. | |
Pro From $100/mo Heavy users who run research daily. | Ultimate $25/mo Heavy AI users. | ||
Duo and Family Duo $14/mo, Family $20/mo Couples and households. | |||
| Which plan to pick | If you have Plus already, you are set; its deep research allowance covers most people. Do not buy ChatGPT just for research unless you also want the rest of it, because Perplexity Pro costs less and is faster. Pro is only worth it if you run reports every day. | Start free. The monthly $10 of credit is plenty for one person using it from Claude Code, and if you do run out you only pay for what you use. Enterprise is for software companies, not for a business that just wants better search. | Use the free trial for a week, then take Professional. 300 searches on Starter goes in a couple of weeks for most people. Only pay for Ultimate if you'd otherwise pay for an AI chat subscription, since it bundles the top models. Yearly billing saves 10%. |
Key features
| Attribute | ChatGPT Deep Research | Exa | Kagi |
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Pros and cons
| Attribute | ChatGPT Deep Research | Exa | Kagi |
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Who each one is for
| Attribute | ChatGPT Deep Research | Exa | Kagi |
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Questions people ask
Which is better, ChatGPT Deep Research, Exa or Kagi?
Kagi scores highest overall in our ratings (ChatGPT Deep Research 3.8/5, Exa 4.0/5 and Kagi 4.3/5). ChatGPT Deep Research is best for market and industry scans and comparing products or suppliers. Exa is best for web search inside Claude Code and finding sites like one you know. Kagi is best for everyday search without ads or tracking and research where you want trustworthy sources.
Which is cheaper, ChatGPT Deep Research, Exa or Kagi?
ChatGPT Deep Research: There's a free plan, and paid plans start at $8/mo. Exa: There's a free plan, and paid plans start at From $4 per 1. Kagi: There's no free plan. Paid plans start at $5/mo.
Which is easier to use, ChatGPT Deep Research, Exa or Kagi?
Kagi rates highest for ease of use in our scores. People who search all day for work and are tired of ads and spammy results.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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