Supabase vs Railway: where should your ai app's backend live?

the full guide

quick answer: for most ai apps it's Supabase: #1 of 5 on our backends board at 9.0/10, because you get a dedicated Postgres with auth, file storage, realtime, edge functions and pgvector in one project, so your coding agent writes features instead of plumbing. Railway is #3 (8.0/10) and it's the better pick for one job: running your own code all day, the API, the queue worker, the agent that never sleeps, with a Postgres next to it on the same canvas. honestly, they're not really rivals: one's a backend you call, the other is somewhere to run the backend you wrote. plenty of people use both.

the short version

ranks and scores come straight from our backend board, and nobody pays to move up it.

why Supabase ranks higher

the boring bits are done. logins, file uploads, live updates and vectors all come with the project. on Railway you'd deploy Postgres, then write or bolt on every one of those yourself. for an indie hacker shipping an ai app on a saturday, that's the whole weekend back.

it's still just Postgres. connect with psql, Prisma, Drizzle or any Postgres client, and Supabase says a project works fine as a plain database with the other products switched off (unused products cost nothing). pgvector means embeddings sit in the same tables as your users; we covered that in Convex vs Supabase.

you can start for free today. the free plan gives you 500 MB of database, 50,000 monthly active users, 5 GB of egress and 1 GB of file storage. the catch: 2 active projects, and free projects are paused after a week of inactivity.

the bill has a ceiling. on the Pro plan spend caps are on by default; you have to switch them off to pay for usage past the plan's quotas. Pro is from $25 a month with $10 of compute credit, which covers one Micro instance, so one database-only project on micro is $25 a month. each extra project adds its own compute (micro is $10 a month), so Supabase's own example of a Pro org with 2 micro projects comes to $35.

the honest bit: it won't host your always-on server. Supabase's pricing lists edge functions (500,000 invocations free, 2 million on Pro) but no containers or app hosting, so the long-running agent loop or the Python worker has to live somewhere else. branching is a paid extra ($0.01344 per branch-hour) and isn't on the free plan.

where Railway wins

it runs anything. your API, the queue worker, the agent loop and the Postgres they all talk to, side by side in one project. it's what our board rates it for: long-running backends, workers and agents.

pay for what actually runs. CPU, memory and disk are billed by the second (about $20 per vCPU and $10 per GB of memory a month if left on), volumes $0.15 per GB-month, egress $0.05 per GB. stopped services cost nothing. on Hobby the $5 a month includes $5 of usage, and on Pro the $20 a month per workspace includes $20, with unlimited seats.

sandboxes for agents. Railway now has sandboxes: isolated, short-lived Linux VMs for agents, builds and untrusted code, billed on CPU actually used and memory held while running, so time spent waiting on a model costs almost nothing. an idle timeout destroys forgotten ones.

Postgres without the magic. the Postgres template is the official Docker image with SSL, private by default, and you can convert it to a high availability cluster with automatic failover, then add backups and connection pooling. pgvector, PostGIS and TimescaleDB come as separate templates rather than in the default one.

the honest bit: Railway paused new signups after its oct 21, 2026 security incident and reopened them on nov 2, 2026 (status update at 2:19 PM ET), but new accounts must subscribe to Hobby or Pro before deploying, and free trial deployments are still unavailable. so for anyone new, Railway costs at least $5 a month from day one. and the database is more yours to run: change the template's image, start command or variables and Railway says it's yours to manage.

which should you pick?

• an ai app that needs users, logins, files and a database by friday: Supabase
• RAG over your own tables with pgvector: Supabase
• a long-running agent, worker or API that has to stay up: Railway
• your own backend plus Postgres on one bill: Railway
• both: Supabase for data and auth, Railway for the server that talks to it. nothing stops you
• Postgres that branches per pull request and scales to zero: Neon (#4). see Neon vs Supabase
• a Next.js front end with previews per pull request: Vercel (#2). see Vercel vs Railway

the rest of the field

faq

is Supabase better than Railway?

on our board, yes: Supabase is #1 (9.0/10) and Railway #3 (8.0/10). Supabase wins if you want a database with auth, storage and vectors built in. Railway wins if you want to run your own servers, workers or agents.

can Railway replace Supabase?

for the database, yes: Railway deploys Postgres from a template it maintains. for the rest, no: auth, file storage and realtime are things you'd build or deploy yourself. you can also self-host Supabase with Docker, which Supabase supports, on whatever platform you like.

Supabase vs Railway pricing: which is cheaper?

it depends what's running. Supabase starts free (2 active projects) and Pro is from $25 a month for one project on micro compute, with a spend cap on by default. Railway's Hobby plan is $5 a month including $5 of usage, then per-second rates for CPU, memory and disk, so the bill follows what you leave running. more on Supabase in Supabase pricing.

does Railway have a free tier like Supabase?

Railway's pricing page lists a free trial ($5 one-time credit for 30 days) and a free plan ($1 a month of usage). but as of its nov 2, 2026 status update, new accounts must subscribe to Hobby or Pro before deploying and free trial deployments are temporarily unavailable. Supabase's free plan is open to anyone.

can i sign up for Railway right now?

yes, since nov 2, 2026. Railway reopened signups after pausing them during its recovery from the oct 21 security incident. no card is needed to create an account, but you'll need a paid plan before you can deploy.

sources

checked 2026-11-03

• Supabase pricing (Free, Pro, Team plans, free limits, 2 active projects, pausing after a week, compute per project and $10 credit, $35 two-project example, spend cap on by default, branching per hour, edge functions invocations, database-only projects, self-hosting): https://supabase.com/pricing
• Railway pricing (free trial, Free, Hobby $5 and Pro $20 with included usage, per-second CPU, memory and volume rates, egress, sandboxes, plan limits): https://railway.com/pricing
• Railway PostgreSQL docs (template, private by default, high availability, backups, extensions via template marketplace, database support scope): https://docs.railway.com/databases/postgresql
• Railway status, recovery after the oct 21 incident (signups reopened nov 2, 2026, 19:19 UTC; paid plan needed to deploy; free trial deployments unavailable): https://status.railway.com/incident/O1VGXWU5
• ranks, scores, verdicts and plans: numptr data/tools.json (backend, database and deploy board)