Curated free-tier infrastructure stacks for AI agents — RAG, coding agents, data pipelines, and chatbots. $0/month to start.
Curated free-tier infrastructure stacks for common AI agent patterns. Each service carries the same verdict our own vendor page gives it. The limits on this page were read from vendor pricing pages between 2026-07-31 and 2026-09-01.
Retrieval-augmented generation — ingest documents, embed them, and answer questions with citations.
| Role | Service | Free Tier | Our verdict | |
|---|---|---|---|---|
| Vector DB | Pinecone Starter | Vector database — 2 GB storage, 2M write units/month, 1M read units/month, 5 indexes, 5M embedding tokens/month. Pinecone Assistant: 100… | active | Pricing → |
| LLM API | Groq Free | Ultra-fast LLM inference on LPU hardware — free tier: 30 RPM, 100K-500K tokens/day depending on model. Supports Llama 4 Scout 17B, Llama… | active | Pricing → |
| Compute | Vercel Hobby | Hobby plan with 100 GB/month Fast Data Transfer, 1M function invocations, 4 hrs Active CPU, 360 GB-hrs Provisioned Memory, 1M edge… | active | Pricing → |
| Database & Storage | Supabase Free | The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free… read 2026-09-03 | at risk | Pricing → |
An agent that writes code, runs tests, and ships PRs — the foundation for AI-powered development workflows.
| Role | Service | Free Tier | Our verdict | |
|---|---|---|---|---|
| LLM API | OpenRouter Free | Free tier includes 25+ free models, 4 free providers, 50 reqs/day rate limit, $25,000 of list price inference / month with no fees, 5% fee… read 2026-09-07 | at risk | Pricing → |
| CI/CD | GitHub Actions Free | Free CI/CD for public repos (unlimited minutes). Private repos: 2,000 min/mo GitHub-hosted runners, 500 MB artifact storage, 10 GB… | active | Pricing → |
| Monitoring | Grafana Cloud Free | Free tier with 10K metric series, 50 GB logs, 50 GB traces, 14-day retention, 3 users | active | Pricing → |
| Auth | Clerk Hobby | Drop-in auth with 50K monthly retained users free, unlimited apps | active | Pricing → |
Orchestrate data ingestion, transformation, and loading — ETL pipelines that run themselves.
| Role | Service | Free Tier | Our verdict | |
|---|---|---|---|---|
| Database | Neon Free | Serverless Postgres with branching — free tier includes 100 CU-hours/month per project, 0.5 GB storage per project, up to 100 projects, 10… | active | Pricing → |
| Queue & Cache | Upstash Free | Serverless Redis — 500K commands/month (256MB data). Vector: 10K vectors free. QStash: 1,000 messages/day free | active | Pricing → |
| Object Storage | Cloudflare R2 Free | Object storage with zero egress fees — 10 GB storage, 1M writes, 10M reads/month free | active | Pricing → |
| Monitoring | BetterStack Free | 10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder | active | Pricing → |
Customer-facing conversational agent with auth, analytics, and fast inference.
| Role | Service | Free Tier | Our verdict | |
|---|---|---|---|---|
| LLM API | Groq Free | Ultra-fast LLM inference on LPU hardware — free tier: 30 RPM, 100K-500K tokens/day depending on model. Supports Llama 4 Scout 17B, Llama… | active | Pricing → |
| Database | Supabase Free | The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free… read 2026-09-03 | at risk | Pricing → |
| Auth | Auth0 Free | Identity platform — 25K MAU (B2C), unlimited logins, social + database connections, Universal Login, 1 Enterprise Connection, 5… | active | Pricing → |
| Analytics | PostHog Free | Product analytics — 1M events/month, 5K session replays, 1M feature flag requests, 100K error events, A/B testing. No credit card required | active | Pricing → |
Use the plan_stack tool to get stack recommendations tailored to your specific project: