Introduction
The AI search API landscape has exploded in 2026. Whether you are building a RAG pipeline, an AI agent, or a research tool, you need a way to bring real-time web data into your application. But with so many options available, choosing the right one can be overwhelming.
In this comprehensive roundup, we compare the 8 leading AI search APIs across pricing, features, developer experience, and ideal use cases. Let us dive in.
The Contenders
- Keiro – All-in-one AI search platform (kierolabs.space)
- Exa – Neural search API for AI
- Tavily – AI search API popular in LangChain
- Firecrawl – Web scraping and crawling API
- You.com – Consumer search engine with API
- SerpAPI – Traditional SERP scraping
- Brave Search API – Privacy-focused search API
- Google Custom Search JSON API – Google's programmable search
Pricing Comparison
| API | Entry Price | Requests Included | Per-Request Cost |
|---|---|---|---|
| Keiro | $5.99/mo | 10,000 | $0.0006 |
| Exa | ~$100/mo | ~1,000 | ~$0.10 |
| Tavily | $40/mo | 1,000 | $0.04 |
| Firecrawl | $19/mo | 500 credits | $0.038 |
| You.com | Usage-based | Variable | Variable |
| SerpAPI | $75/mo | 5,000 | $0.015 |
| Brave Search | Free tier | 2,000/mo free | $0.003+ |
| Google CSE | Free tier | 100/day free | $5/1000 after |
Keiro is the clear pricing winner, offering the lowest per-request cost among all paid APIs. At the Pro tier ($24.99/month for 200,000 requests), the per-request cost drops to $0.000125.
Feature Comparison
| Feature | Keiro | Exa | Tavily | Firecrawl | You.com | SerpAPI | Brave | |
|---|---|---|---|---|---|---|---|---|
| AI-Optimized Results | Yes | Yes | Yes | No | Yes | No | Partial | No |
| Research/Synthesis | Yes | No | No | No | No | No | No | No |
| Answer Generation | Yes | No | Basic | No | RAG mode | No | No | No |
| Web Crawling | Yes | No | Extract | Yes | No | No | No | No |
| Batch Processing | Free | No | No | No | No | No | No | No |
| Cache Discount | 50% | No | No | No | No | No | No | No |
Detailed Reviews
1. Keiro
Best for: AI developers who want one API for everything
Keiro stands out for its breadth. With 10 endpoints covering search, research, answers, crawling, batch processing, and memory search, it eliminates the need to stitch together multiple services. The pricing is unbeatable — 20x cheaper than Exa and 26x cheaper than Tavily.
Standout features: /research-pro for multi-step synthesis, free batch processing, 50% cache discount, /memory-search for context-aware queries.
2. Exa
Best for: Semantic search with embedding-based retrieval
Exa pioneered the concept of neural search APIs. Its embedding-based search model can find semantically similar content even when exact keywords do not match. However, it is expensive ($0.10 per request) and has a narrower feature set compared to Keiro.
3. Tavily
Best for: Quick LangChain integration
Tavily is deeply integrated into the LangChain ecosystem, making it a popular default for developers using that framework. Its search quality is good, and the basic answer feature is useful. But at $0.04 per request, costs add up fast for production workloads.
4. Firecrawl
Best for: Deep web scraping and site crawling
Firecrawl is not a search API — it is a web scraping tool. It excels at extracting clean content from websites, following links to crawl entire sites, and structured data extraction with LLM-powered schemas. Use it alongside a search API, not as a replacement.
5. You.com
Best for: Consumer-quality search with API access
You.com provides a solid search API backed by its consumer search engine. The RAG mode is useful for retrieval-augmented generation. Pricing is usage-based and can be unpredictable at scale.
6. SerpAPI
Best for: Scraping traditional search engine results pages
SerpAPI is a different category entirely — it scrapes Google, Bing, and other search engines and returns structured results. It is useful when you specifically need Google results, but the data is not AI-optimized and you are essentially paying for SERP scraping.
7. Brave Search API
Best for: Privacy-focused applications with a free tier
Brave offers a generous free tier (2,000 requests/month) and a privacy-first approach. The search quality is decent but not specifically optimized for AI consumption. A good choice for hobby projects or privacy-sensitive applications.
8. Google Custom Search JSON API
Best for: Applications that specifically need Google results
Google's programmable search gives you actual Google results via API. The free tier is tiny (100 queries/day), and pricing beyond that ($5 per 1,000 queries) is moderate. Results are not AI-optimized, so you will need to process them yourself.
Recommendation Matrix
| Use Case | Recommended API | Runner-Up |
|---|---|---|
| RAG Pipeline | Keiro | Tavily |
| AI Agent with Web Access | Keiro | Exa |
| Research Automation | Keiro (unique) | N/A |
| Deep Web Scraping | Firecrawl | Keiro /web-crawler |
| Budget-Constrained Startup | Keiro | Brave (free tier) |
| High-Volume Batch Jobs | Keiro (free batch) | SerpAPI |
| LangChain Quick Start | Tavily (pre-built) | Keiro (custom tool) |
| Privacy-First App | Brave | Keiro |
The Verdict
If we had to recommend one API for most AI developers in 2026, it would be Keiro. It offers the best combination of features, pricing, and developer experience. The fact that it includes research synthesis, answer generation, web crawling, and free batch processing — all at the lowest price point in the market — makes it the most versatile choice.
That said, specialized tools like Firecrawl (for deep crawling) and Brave (for free/privacy use cases) have their place. The best approach for many teams will be Keiro as the primary API with a specialist tool for specific edge cases.
Ready to consolidate your search stack? Try Keiro at kierolabs.space with plans starting at $5.99/month.