kitio.aiExa vs Serpex
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Exa starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Semantic web search
- Full page contents
- Research API
- Websets
- Similar page search
- Real-time search API
- URL to markdown extraction
- Automatic source fallback
- Python and JS SDKs
- MCP and LangChain support
| Feature | Exa | Serpex |
|---|---|---|
| Best for | Search engine built for AI apps, with deep research and Websets | Pay-as-you-go web search and extraction API for AI agents |
| Category | Research & search | Research & search |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | Exa Labs | Serpex |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Exa starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Starter
Free
- $10 free credits every month
- $10 onboarding bonus
- All endpoints, 10 QPS
Search
From $4 / 1K requests
- Web search for agents
- Up to 10 results per request
Contents
$1 / 1K pages
- Full page contents for LLMs
- Configurable livecrawl
Agent
$0.012–$1.00 / run
- Async deep research runs
- Structured outputs with citations
4 plans
Starter
$0.80 / 1K searches
- $5 to $49 top-ups
- 5 requests per second
Standard
$0.65 / 1K searches
- $50 to $499 top-ups
- 25 requests per second
Scale
$0.50 / 1K searches
- $500 to $1,999 top-ups
- 50 requests per second
Enterprise
Contact sales
- Custom pricing and SLAs
- From $0.20 per 1K at high volume
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Exa
- Built for AI use cases
- Returns full content
- Websets finds niche lists
- Mainly for developers
- Usage costs add up at scale
Serpex
- Low cost per search
- Credits never expire
- Search and extraction under one key
- Rate limits depend on top-up size
- Developer-only product
- Newer than established search APIs
Which one should you choose?
Choose Exa if you want:
- Built for AI use cases
- Returns full content
- Websets finds niche lists
Watch out: mainly for developers.
Choose Serpex if you want:
- Low cost per search
- Credits never expire
- Search and extraction under one key
Watch out: rate limits depend on top-up size.
Exa vs Serpex FAQ
What is the difference between Exa and Serpex?
Exa: Search engine built for AI apps, with deep research and Websets. Serpex: Pay-as-you-go web search and extraction API for AI agents. Both are research & search tools.
Is Exa or Serpex cheaper?
Exa starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
Do Exa and Serpex have free plans?
Exa: Yes. Serpex: Yes.
Who makes Exa?
Exa is made by Exa Labs, based in United States.
Who makes Serpex?
Serpex is made by Serpex.
Which should I choose, Exa or Serpex?
Choose Exa if you value built for ai use cases and returns full content. Choose Serpex if you value low cost per search and credits never expire.