Best B2B data APIs for AI agents and GTM workflows
Data providers that sell person, company or signal data through an API, for teams building their own AI SDR agents or enrichment pipelines.
How this list works: Listed alphabetically. Only tools whose own pages describe API access. Pricing verified against vendor pages (latest check ). No placement here is paid. Methodology.
| Tool | What it is | Price (vendor-published) | Free plan | Channels |
|---|---|---|---|---|
| Apify | Web scraping and automation platform with thousands of ready-made scrapers (Actors), often used to pull lead and company data for agents. | Free ($5/mo of usage); Starter $19/mo, Scale $199/mo, Business $999/mo, each including that amount of usage plus pay-as-you-go ($0.20 to $0.13 per compute unit); 10% off billed annually; proxies and add-ons extra | Yes | — |
| Autobound | Sales signal data: a signal database, REST API and MCP server with hundreds of company and contact signals for personalized outreach. | One-time credit packs: Starter $19 (1,900 credits), Growth $49, Scale $149, Pro $499, Business $1,299, Enterprise $4,999; custom contracts for volume; zero-result requests are free | — | |
| Coresignal | Company, employee and job-posting data delivered via APIs (including an agentic search API) and datasets. | Credit plans from Mini $49/mo (2,500 credits) through Starter $199, Pro $499, Growth $1,000, Premium $1,500 (1,000,000 credits), Scale $3,000 and Elite $5,000/mo; yearly 10% off; free tier and 7-day free trial | Yes | — |
| Crustdata | Real-time people, company and job data API with hiring, funding and company-event signals, built for AI agents and GTM tools. | Credit-based API: new accounts get $20 in free credits; searches billed per result (0.03 credits) and enrichment per record (people from 1 credit, companies from 2); enterprise plans 'from four figures a month' | — | |
| Datagma | Contact enrichment focused on mobile numbers and verified emails, usable directly, via API or inside Clay and waterfall tools. | Free (100 credits/mo: 100 emails or 3 phones); Regular $49/mo (3,000 credits, 1 seat); Popular $99/mo (7,500 credits, 3 seats); Expert $249/mo (22,500 credits, 5 seats); extra seats $5/user/mo; 1 credit per email, 30 per mobile number; save 20% annually | Yes | email, phone |
| Exa | Web search API built for AI agents, with company and people search, page contents and asynchronous research runs. | Pay per use: free $10 in credits every month plus a $10 onboarding bonus; Search from $4 per 1,000 requests (Deep Search $12), page contents $1 per 1,000 pages, Monitors $15 per 1,000 requests; Agent runs $0.012–$1.00 each; contact enrichment $0.02 per email, $0.07 per phone | Yes | — |
| Explorium | B2B company and contact data for AI agents and GTM workflows, sold as pay-as-you-go credits. | Credit packages: free trial (100 credits); Lite $29.99 (500 credits), Starter $149.99 (5K), Growth $749.99 (30K), Scale $7,499.99 (500K); enterprise via sales | — | |
| Firecrawl | Web scraping, crawling and search API that turns websites into clean data for AI agents and LLM apps. | Free (1,000 credits/mo); Hobby $16/mo billed yearly ($19 monthly, 5,000 credits); Standard $83/mo billed yearly (100,000 credits); Growth $333 (500,000); Scale $599 (1,000,000); extra credits $5 per 1,000–5,000 by plan; Enterprise custom | Yes | — |
| Parallel | Web research and search APIs for AI agents, with structured outputs and citations. | Pay as you go; Task API (deep web research with structured outputs) from $5 per 1,000 requests (Lite) to $2,400 per 1,000 (Ultra8x); Search, Extract and other APIs priced per request; up to 5,000 free requests/mo and $5 free credits/mo | Yes | — |
| People Data Labs | B2B person and company data APIs for building enrichment into products and pipelines. | Free up to 100 credits/mo (contact data obfuscated); Self-Serve from $98/mo (350 credits, contact data included); annual commits save 20%; Enterprise custom | Yes | — |
| Tavily | Web search and extraction API built for AI agents and LLM apps. | Researcher free (1,000 API credits/mo, no card); Project $30/mo (4,000 credits, higher rate limits); pay as you go $0.008/credit; Enterprise custom | Yes | — |
| TheirStack | Job-posting and technographic data for finding companies that are hiring for, or using, specific technologies, via app and API. | Credit-based: e.g. 1,000 company credits $109 ($0.109 each) for job postings, technologies and firmographics; monthly subscriptions 10% off; unused credits roll over for 12 months; free trial credits included | — | — |
FAQ
How are B2B data APIs priced?
Mostly by credits: Crustdata starts new accounts with $20 in free credits and bills per result; Explorium sells packages from $29.99 for 500 credits; Autobound sells one-time packs from $19; People Data Labs has a free tier and Self-Serve from $98/mo; Datagma has a free plan and paid plans from $49/mo with API access.
Which data APIs focus on signals rather than contacts?
Crustdata highlights real-time hiring, funding and company-event signals, and Autobound sells a signal database via REST API and MCP server.
Compare tools from this list
- Crustdata vs People Data Labs
- Explorium vs Crustdata
- Coresignal vs Crustdata
- Coresignal vs People Data Labs
- Exa vs Firecrawl
- Exa vs Explorium
- Firecrawl vs Apify
- Tavily vs Exa
- Tavily vs Firecrawl
- Parallel vs Exa
- Parallel vs Tavily
Related roundups
- Best free sales prospecting tools
- Best Clay alternatives for data enrichment and GTM workflows
- Best web search & browsing APIs for AI sales agents
- Best technographic and hiring-signal data tools
- Best Apollo.io alternatives
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