Top 7 Supabase Alternatives for Startups (2026)

Two migrations wearing one name

Choosing Firebase means choosing between two products with very different migration costs. Firestore is the original: a NoSQL document store with no joins, no referential integrity, no server-side SQL aggregation beyond count, sum, and avg, and no text search without bolting on Algolia or Typesense. Every non-trivial query needs a hand-declared composite index, and a database is capped at 1,000 composite indexes with billing enabled. Firebase SQL Connect, generally available since April 2025 and previously called Data Connect, is the other path: a GraphQL schema layer over Cloud SQL for PostgreSQL that generates typed SDKs. For a team leaving Supabase, SQL Connect is the honest comparison, because it is Postgres to Postgres. The tradeoff is cost. Firestore has a real free tier at 1 GiB stored with 50,000 reads and 20,000 writes per day. SQL Connect is free to 250,000 operations per month on Blaze but sits on a Cloud SQL instance that starts around $9.37 per month after the trial.

Auth and storage parity

Firebase Authentication is the cleanest part of the swap. The free allowance is 50,000 monthly active users, matching Supabase, and password migration is a solved problem: the firebase auth:import command accepts BCRYPT directly, which is exactly the hash format Supabase stores in auth.users.encrypted_password. No password resets, no lazy migration layer. Two caveats. Enterprise SAML and OIDC connections have their own free allowance of just 50 monthly active users, and phone authentication is billed per SMS rather than counted against the MAU pool. Cloud Storage for Firebase gives 5 GB on the free plan, and because Firebase Storage buckets are Google Cloud Storage buckets, you can sync from Supabase Storage using any S3 client against Supabase's S3 endpoint and then repoint Firebase at the destination bucket.

Why the migration is genuinely small

This is a Postgres to Postgres move, and Neon publishes a guide for it. Two details decide whether it goes smoothly. First, create the Neon project on the same Postgres major version as your Supabase project, because mismatched pg_dump and server versions is the standard failure. Supabase puts new projects on Postgres 17 while older projects sit on 15, and Neon supports 14 through 18. Second, restore with --no-owner and --no-acl. Supabase ties object ownership and access control to its own auth roles, and those roles do not exist on Neon, so without those flags the restore fails on permissions. Grants do not carry over and you re-apply them by hand. Extensions mostly survive: pgvector, pg_cron, and PostGIS are all supported, so retrieval augmented generation and geospatial work continue unchanged.

What Databricks ownership changed

Databricks announced its acquisition of Neon in May 2025 for roughly $1 billion, and the practical effects for a startup have been positive so far. The free tier survived and now offers 100 compute-unit hours per project per month. The startup program was folded into the Databricks Startup Program, announced in June 2026, offering up to $200,000 in credits across Databricks and Neon for venture-backed companies from pre-seed through Series A. That is a materially larger number than anything Supabase ever published, which is the practical argument for making Neon the default Postgres destination rather than a sidegrade.

The self-host escape hatch

The structural argument for Appwrite is that the hosted product and the software are separable. If pricing changes, if the company is acquired, or if a program you were counting on disappears the way Supabase's did, you can run the same software on your own infrastructure without rewriting the application. That is the property people thought they were buying with Supabase, and it is worth more after a year in which a startup program vanished from a vendor's site with no announcement. Students and open source maintainers have additional free routes: Appwrite's education program includes Pro through the GitHub Student Developer Pack, and there is a separate free Pro path for open source projects.

Where the free tier actually binds

The 75,000 monthly active user allowance is the headline and it is real, but it is not the limit you will hit first. The binding constraints on the free plan are 5 GB of bandwidth per month, 2 GB of storage, one database per project, and two projects sharing resources. For a pre-launch product that is comfortable. For anything with media or a meaningful number of file uploads, bandwidth is the ceiling, and Pro at $25 per month lifts it to 2 TB. The startup program is the lever worth pulling before you pay: up to $20,000 in credits over twelve months, requiring only that the company was founded within the last ten years, has a live site, and has at least two people on the team.

The integration that saves the migration

Supabase supports a set of external identity providers as first-class JWT issuers, and Auth0 is on that list alongside Clerk, Firebase Auth, AWS Cognito, and WorkOS. The mechanism is worth understanding because it is what makes this a configuration change rather than a data migration. Supabase's row level security policies call auth.uid() and auth.jwt(), which read claims that PostgREST extracts from the incoming token. Point Supabase at Auth0's OIDC discovery URL and it verifies Auth0-signed tokens against Auth0's JWKS instead of its own secret. Nothing about your policies changes. Two requirements are non-negotiable: the tokens must be asymmetrically signed with a kid header so Supabase can select the right key, and Auth0 must add a role claim with the value authenticated or PostgREST has no role to switch into and your policies will not behave.

Free tier reality check

The widely repeated figure of 7,500 monthly active users on the Auth0 free plan is out of date. It is 25,000, and the plan includes passwordless login, unlimited social connections, brand customization, one enterprise connection, self-service SSO, and SCIM. What is excluded is more instructive: multi-factor authentication, per-organization role based access control, custom database login against your own user store, enhanced attack protection, and separate production and development environments. That last exclusion catches teams off guard, because running staging and production off one tenant is a habit worth avoiding. If you can meet the startup program criteria, one year of B2B Professional removes all of these constraints and raises the ceiling to 100,000 MAU.

Where the free tier ends

The free plan covers email OTP, magic link, Google and Facebook social login, a hosted login page, and basic attack protection, for 25,000 monthly active users and an unlimited number of total users. That last distinction matters more than it sounds: plans that count total registered users rather than active ones punish you for dormant accounts you will never monetize. The upgrade trigger is feature-shaped rather than volume-shaped. Passkeys, multi-factor authentication, SMS OTP, separate production and test environments, custom domains, branded templates, bot protection, and enterprise SSO all live on Business Pro, which starts at $50 per month from the 5,000 MAU tier. If you need passkeys on day one, the free tier is not your plan.

Eligibility that actually fits early teams

The startup perk is 50% off annual Business Pro for one year, and the qualifying criteria are noticeably wider than Auth0's: under five years old, under $10 million raised, a public website, and not an existing customer. There is no venture-backing requirement, which matters because bootstrapped and revenue-funded companies are excluded from a large share of the startup programs in this category, including Auth0's and the Databricks program behind Neon. The same 50% applies to non-profits. Terms are applied for through the pricing page rather than a separate program page.

Why zero egress changes the math

Supabase's free tier includes 5 GB of egress and charges $0.09 per GB beyond the Pro allowance. R2 charges nothing for egress, ever, through the Workers API, the S3 API, and r2.dev. For a product serving images, video, audio, or model weights, egress is usually the bill that grows fastest and least predictably, and removing it entirely is worth more than a larger storage allowance would be. The migration is mechanically simple because both sides speak S3 with Signature Version 4: Supabase Storage exposes an S3 endpoint once you enable the S3 connection in settings, so any S3 client can sync to R2. Cloudflare Sippy does the same job incrementally, copying objects on first request, which makes it the zero-downtime option. One limit to note: the R2 free tier covers Standard storage only, and Infrequent Access adds a retrieval charge.

Where D1 fits and where it does not

D1 is Cloudflare's SQLite database running at the edge, and the free tier is real: 5 million rows read per day, 100,000 rows written per day, 5 GB of total storage. The constraint that disqualifies it for most Supabase migrations is the per-database cap of 10 GB on paid plans, which Cloudflare documents as a hard limit that cannot be raised, alongside 500 MB per database on the free tier and a maximum of 10 databases. There is no pgvector, so anything doing semantic search or retrieval augmented generation is out. Use D1 when the data is genuinely small and read-heavy and latency at the edge is the point. Use Neon when you need Postgres.

The genuinely-zero-cost option

Every other entry on this list has a free tier with a ceiling and a business model behind it. PocketBase has neither. It is one compiled Go binary that you copy to a server and run, bundling SQLite, a REST API, authentication with email and password plus OAuth2, file storage, realtime subscriptions, and an admin dashboard. For a founder validating an idea before there is revenue, the arithmetic is hard to argue with: the hosting bill is whatever the smallest VPS costs, and no project pauses because a week went by without traffic. Backups are copying a file.

Read the FAQ before you commit

The project's own FAQ is the most important document in this comparison. It states that there is no paid team or company behind PocketBase, that it is a personal open source project with intentionally limited scope developed entirely on a volunteer basis, and that there are no promises for maintenance and support. The current version is 0.40.4, and the README notes that full backward compatibility is not guaranteed before 1.0.0. None of that makes it a bad choice for a prototype, an internal tool, or a product you are still deciding whether to build. It does make it a deliberate risk for anything holding customer data you cannot afford to migrate on short notice.