Firebase alternatives

Firebase alternatives

Firebase suits teams already building on Google Cloud who accept usage-based billing. If that is not you, Appwrite suits teams wanting an open-source backend with a hosted option; Convex suits developers who want a reactive backend where queries update live; Supabase suits teams that want a Postgres database queried directly from client code and are willing to write and review RLS policies. The list is alphabetical and is not a ranking.

Why people look past Firebase

This page lists options for someone leaving Firebase, drawn from tools in the same area. We only include a tool when a page owned by the vendor backs our description of it, and we say where Firebase is the better fit.

• Paid Google Cloud products such as Pub/Sub, Cloud Run, or BigQuery streaming for Analytics are not available to projects on the Spark plan.^[1]
• Firestore free quota listed by one third-party guide: 50,000 reads, 20,000 writes and 20,000 deletes per day, and 1 GiB stored data.^[2] One source only.
• The same guide lists overage at $0.03 per 100,000 reads and $0.09 per 100,000 writes and notes rates vary by region.^[2] One source only.

We read each source on 2026-11-05. Prices and limits change often, so confirm on the vendor's own page before you buy. A figure marked "one source only" was not matched by a second publisher.

What Firebase does well

Before you switch, know what you would give up:

• Firebase offers two pricing plans: the no-cost Spark plan and the pay-as-you-go Blaze plan.^[1]

Pricing as reported for Firebase:

• Spark: $0 (No payment method required for most features; a product that exceeds its quota is cut off rather than billed, per third-party summary) ^[1]
• Blaze: Pay as you go (Keeps the same free quotas and bills for usage above them; unlocks paid Google Cloud products) ^[1]

At a glance

The alternatives, one by one

Appwrite

Appwrite offers a hosted backend with databases, auth, storage and functions on Free and Pro plans.^[4]

What the sources say:

• Pro adds organization roles, email support and daily backups kept for 7 days.^[4]

Limits and things to check:

• Appwrite's docs state the Free plan allows one organization and 2 projects.^[3]
• A paid Appwrite Start plan sits between Free and Pro and is live only in India, per Appwrite's blog.^[8]

Pricing as reported for Appwrite:

• Free: $0 ^[3]
• Pro: $25 per month ^[4]

Plan limits are longer than fit here and some sources disagree on them, so read the limits on the vendor pricing page.

Suits teams wanting an open-source backend with a hosted option. That is our reading of the facts above, not something a source says.

Convex

Convex is a backend platform with a built-in database and server functions, priced per developer with usage allowances.^[5]

Limits and things to check:

• The plans page lists Professional at $25 per developer per month.^[5]
• Convex limits docs state limits are applied per team unless stated otherwise.^[9]
• Starter developer allowance is inconsistent across sources (limits doc shows 1 to 6).^[9]

Pricing as reported for Convex:

• Starter: Pay for usage (1,000,000 function calls per month included; overage $2.2 per 1,000,000; 0.5 GB database storage per search summary) ^[5]
• Professional: $25 per developer per month ^[5]

Plan limits are longer than fit here and some sources disagree on them, so read the limits on the vendor pricing page.

Suits developers who want a reactive backend where queries update live. That is our reading of the facts above, not something a source says.

Supabase

Supabase hosts Postgres databases and exposes them through a Data API, with Row Level Security policies controlling which rows each role can read or write.^[10]

What the sources say:

• The fix given for that lint is to run 'alter table ... enable row level security' and then add policies defining who may access rows.^[11]
• Once RLS is enabled with no policies, no data is accessible through the API to the anon role until policies are added.^[12]
• Supabase sends daily emails about exposed tables that lack RLS and provides a Security Advisor in the dashboard.^[13]
• The hardening guide suggests an event trigger that enables RLS automatically on new tables, and describes options such as disabling the Data API or exposing a custom schema instead of public.^[13]
• Supabase documents publishable keys (sb_publishable_...) for client-side code and secret keys (sb_secret_...) for servers and Edge Functions; the legacy anon and service_role keys are being retired by the end of 2026.^[14]
• Policies should target the anon and authenticated roles.^[14]

Limits and things to check:

• The database linter rule 0013 (RLS disabled in public) is rated ERROR and states that without RLS on a public table, anyone with the project URL can create, read, update and delete rows in it.^[11] One source only.
• Any table created in the public schema is accessible through the Supabase Data API, and the Securing your API guide recommends enabling RLS on tables, views and functions there.^[10]
• Tables created in the dashboard Table Editor have RLS enabled by default; tables created through raw SQL or the SQL Editor need RLS enabled manually.^[12]
• The service_role key has the BYPASSRLS attribute, so RLS policies never apply to it.^[14]
• A Free-plan Supabase project is paused after one week of inactivity, per third-party summaries.^[15]

Pricing as reported for Supabase:

• Free: $0 ^[15] One source only, so confirm it on the vendor page.
• Pro: $25 per month ^[6]

Plan limits are longer than fit here and some sources disagree on them, so read the limits on the vendor pricing page.

Suits teams that want a Postgres database queried directly from client code and are willing to write and review RLS policies. That is our reading of the facts above, not something a source says.

When to stay with Firebase

Stay with Firebase if it matches your situation: it suits teams already building on Google Cloud who accept usage-based billing. Switching costs time, and none of the options above is better for everyone.

Where Continuum fits

We make Continuum Supabase Security Review. Weigh what we say here with that in mind. The tools above are the better choice when you want software you run yourself; ours is the better choice when you want a person to do or read the work.

Continuum Supabase Security Review (ours)

A human review of a Supabase app covering row level security policies, key exposure, storage rules, auth config and service-role usage.^[7]

What our own page says:

• It returns ranked findings with corrected SQL and a proof for each, in 48 hours.^[7]

Limits and things to check:

• It is a manual review of one app, not a continuous monitor.^[7]

Pricing as reported for Continuum Supabase Security Review:

• Supabase Security Review: Quoted on the page (48 hour turnaround) ^[7]

Suits a team running on Supabase that wants a person to read its policies and keys before launch.

Details on Continuum Supabase Security Review.

Running on Supabase?

Straight answers