Aiven
↗Managed data platform with Postgres, Kafka, Redis, OpenSearch and more, across multiple clouds.
FreemiumNo card
$300 trial credits to explore all services, no card required.
Data & backend
20 tools
Beeceptor
↗Intercept, mock and debug HTTP requests without writing a single line of backend code.
FreemiumNo card
50 requests per day per endpoint on the free plan.
CockroachDB
↗Distributed SQL database with high availability, ACID consistency and Postgres compatibility.
FreemiumNo card
10 GB storage and 50 million RUs per month on the free serverless plan.
Convex
↗Reactive TypeScript backend with database, functions, sync, search and file storage
FreemiumNo cardOSS
Free & Starter includes 1M function calls and 20 GB-hours of compute per month, 0.5 GB database storage, 1 GB file storage, 1 GB egress and 1,000 concurrent sessions.
Gel (formerly EdgeDB)
↗Open-source graph-relational database with typed schemas, EdgeQL and managed cloud
FreemiumNo cardOSS
Gel Cloud Free includes 1/4 compute unit, 1/2 GiB RAM, 1/16 vCPU and 1 GB disk. Pro starts at $19.50/month with 1/2 compute unit, 10 GiB storage and 100 GiB transfer.
Fauna
↗Serverless transactional document database delivered as a web-native API
FreemiumNo card
The Free plan includes 5 databases, 100,000 transactional reads, 50,000 transactional writes, 500,000 compute operations and 100 MB of storage per month, enforced limits.
Hoppscotch
↗Open source REST, GraphQL and WebSocket client in the browser, a lightweight Postman alternative.
FreeNo cardOSS
Free and open source. The cloud version includes 10,000 requests per month.
InsForge
↗An agent-native backend with database, auth, storage, functions and model access.
FreemiumNo card
Free developer plan with a Postgres database, auth, storage, functions and limited model credits for prototypes.
IPinfo
↗IP geolocation and data API with global coverage, ASN, connection type and more.
FreemiumNo card
50,000 requests per month, no credit card required.
JSONPlaceholder
↗Free public REST API with sample data for prototyping and learning with zero setup.
FreeNo cardOSS
Completely free, no sign-up. POST/PUT/DELETE calls are simulated and do not persist.
MockAPI
↗Create fake REST endpoints in seconds to prototype and test frontends without a real backend.
FreemiumNo card
1 project with up to 4 resources and unlimited requests.
MongoDB Atlas
↗Document database as a service, with vector search, Atlas Search and global deployment.
FreemiumNo card
Free M0 cluster with 512 MB storage, no time limit.
Neon
↗Serverless Postgres with autoscaling, database branching and pay-per-use pricing.
FreemiumNo card
0.5 GB storage, 1 project and compute that scales to zero when idle.
Open-Meteo
↗Open source and free weather API with global models, historical data and hourly forecasts.
FreemiumNo cardOSS
Free for non-commercial use, no sign-up and no declared request limit.
OpenGraph.io
↗API to extract Open Graph metadata from any URL, useful for link previews in apps.
FreemiumNo card
100 requests per month on the free plan.
PlanetScale
↗Managed MySQL-compatible Vitess and Postgres databases with branching and horizontal scaling
PaidCard
No free plan. Base includes 10 GB storage, 1 production branch, 1,440 dev-branch hours, 7-day Query Insights retention, 12-hour backups; single-node Postgres at $5/month.
Supabase
↗Postgres backend with database, auth, storage, realtime and edge functions.
FreemiumNo cardOSS
2 projects, 500 MB database, 1 GB storage, 5 GB egress and 50,000 monthly active users.
Turso
↗Globally distributed edge SQLite database, built on libSQL.
FreemiumNo cardOSS
500 databases, 9 GB total storage and 1 billion monthly reads.
Upstash
↗Serverless Redis and Kafka with per-request pricing, designed for edge and serverless environments.
FreemiumNo card
10,000 daily commands on Redis and 10,000 daily messages on Kafka.
Xata
↗Open-source Postgres branching with copy-on-write storage and scale-to-zero
Trial onlyNo cardOSS
Self-hosted Open Source is free forever. Xata Cloud has a 14-day trial, then $0.012/hour plus $0.28/GB/month storage. Micro: up to 2 vCPUs, 1 GiB RAM, scale-to-zero.
ABOUT US
Curated tools, honestly reviewed.
Every tool in this category has been manually reviewed. Pricing, free tier limits and card requirements are checked before listing.
FAQ
Questions, answered.
Are these the best tools in this category?＋
They're the ones we'd actually use. We prioritize tools with a clear use case, a working free tier, and honest pricing, not the most popular or most marketed.
How do I filter by free tools only?＋
Use the pricing filter in the sidebar. Select Free or Freemium to narrow the list. Each card also shows whether a card is required.