Best APIs & backend
The top 20 products in APIs & backend that have a free tier and have an API, out of 29 in the category. Listed in ranking order and compared on pricing, free tier, API, MCP server, SDK and open source. 20 of 20 have a free tier, 20 of 20 have an API, 12 of 20 offer an MCP server, 4 of 20 are open source.
- IP-API.com
IP Geolocation API - lookup any IP address
- IPGeolocation.io
IP geolocation API and downloadable IP intelligence databases with threat intelligence
- IPWho
IP geolocation API returning location, network, company, timezone, currency, security and user-agent data for any IPv4 or IPv6 address
- Inngest
Durable execution for workflows and AI agents
- Hook0
Open-source webhooks-as-a-service with HMAC signatures, configurable retries, and EU hosting
- FreeIPAPI
Free IP geolocation API for IPv4 and IPv6 addresses, available in JSON and XML formats.
- Formfeed
PDF, e-invoice and image API for developers and AI agents
- finlight
Real-time financial news API with sentiment analysis, WebSocket streaming, and an advanced query builder
- CarAPI.dev
Automotive data API platform for VIN decoding, vehicle history, listings, and EV data
- BigDataCloud
IP geolocation, reverse geocoding, phone/email verification, and network intelligence APIs
- App AI Gateway
Keep AI provider keys out of your iOS app. Verify each request with App Attest and set limits and budgets per user.
- APIVerve
One key for 300+ production APIs
- APITemplate.io
Automate PDF documents and images at scale
- AnyHook
Webhook relay that answers senders in about a second, stores every event, and forwards to your handler with retries and replay
- AlphAI
Financial news API for trading bots and AI agents
- Abstract API
API suite for email, phone, and IP verification, fraud detection, and data enrichment
- FinancialData.Net
Stock Market API & Financial Data API
- DB-IP Free IP Geolocation API
Free IP geolocation API providing IP to country, state, and city mapping.
- Commerce Layer
API-first, headless commerce platform for multi-market ecommerce
- Calendarific
Global Holiday Calendar API for National and Religious Holidays
Side by side
| # | Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|---|
| 1 | IP-API.com | Freemium | yes | yes | no | no | no |
| 2 | IPGeolocation.io | Freemium · from $19/month | yes | yes | no | yes | no |
| 3 | IPWho | Freemium · from Free tier available; paid plans from $2.50/mo | yes | yes | no | yes | no |
| 4 | Inngest | Freemium · from $0 | yes | yes | yes | yes | yes |
| 5 | Hook0 | Freemium · from Free tier (100 events/day); paid cloud plans from €59/mo excl. VAT | yes | yes | yes | yes | yes |
| 6 | FreeIPAPI | Freemium | yes | yes | no | no | yes |
| 7 | Formfeed | Freemium · from 0 EUR/month (Free, 100 units); paid plans from 19 EUR/month (Starter) | yes | yes | yes | yes | no |
| 8 | finlight | Freemium | yes | yes | yes | yes | no |
| 9 | CarAPI.dev | Freemium · from Free tier (100 requests/month); paid plans from 29 EUR/month | yes | yes | yes | no | no |
| 10 | BigDataCloud | Freemium · from Free tier (10k-50k calls/month depending on package); paid plans from $29.95/month (Bronze, IP geolocation package) | yes | yes | yes | yes | no |
| 11 | App AI Gateway | Freemium | yes | yes | yes | yes | yes |
| 12 | APIVerve | Freemium · from $0 | yes | yes | yes | yes | no |
| 13 | APITemplate.io | Freemium · from $19 | yes | yes | no | yes | no |
| 14 | AnyHook | Freemium | yes | yes | yes | no | no |
| 15 | AlphAI | Freemium · from $0 | yes | yes | yes | yes | no |
| 16 | Abstract API | Freemium | yes | yes | no | yes | no |
| 17 | FinancialData.Net | Freemium · from $0 | yes | yes | yes | yes | no |
| 18 | DB-IP Free IP Geolocation API | Free | yes | yes | no | no | no |
| 19 | Commerce Layer | Freemium | yes | yes | yes | yes | no |
| 20 | Calendarific | Freemium | yes | yes | no | no | no |
Ranked by verification, completeness, extraction confidence and method (AI model or heuristic fallback), and API/MCP support; ties go to the newest listing. Paid plans aren't an input to the ranking. Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted.
All 29 products in APIs & backend →
API
curl 'https://toolgrep.com/api/products?category=api-platforms&has_free_tier=1&has_api=1'