Firebase vs Convex

Firebase vs Convex

Neither is better for everyone. Firebase suits teams already building on Google Cloud who accept usage-based billing. Convex suits developers who want a reactive backend where queries update live.

Firebase vs Convex at a glance

This page compares Firebase and Convex using only what the sources below say about each. Where one is the better pick for a situation, we say which and why.

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.

When to pick each one

Pick Firebase if it matches your situation

Choose Firebase over Convex for teams already building on Google Cloud who accept usage-based billing.

What the sources say about Firebase:

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

Pick Convex if it matches your situation

Choose Convex over Firebase for developers who want a reactive backend where queries update live.

Limits and things to check

Firebase

• 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.^[3] 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.^[3] One source only.

Convex

• The plans page lists Professional at $25 per developer per month.^[2]
• Convex limits docs state limits are applied per team unless stated otherwise.^[4]
• Starter developer allowance is inconsistent across sources (limits doc shows 1 to 6).^[4]

Pricing as reported

Firebase

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]

Convex

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) ^[2]
• Professional: $25 per developer per month ^[2]

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

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.^[5]

What our own page says:

• It returns ranked findings with corrected SQL and a proof for each, in 48 hours.^[5]

Limits and things to check:

• It is a manual review of one app, not a continuous monitor.^[5]

Pricing as reported for Continuum Supabase Security Review:

• Supabase Security Review: Quoted on the page (48 hour turnaround) ^[5]

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