Firebase Auth / Identity Platform vs Descope
Answer: As of 2026-10-31: Firebase Auth / Identity Platform and Descope tie at $0 for 1k users · no SSO; Firebase Auth / Identity Platform wins 10k users · 1 SSO at $2.25/mo ($2,961/yr less than Descope) [Firebase Auth / Identity Platform SSO assumes 200 SSO users per connection; at 2,000 per connection: Firebase Auth / Identity Platform $29.25/mo, Descope $249/mo]; Firebase Auth / Identity Platform wins 50k users · 5 SSO at $14.25/mo ($24,417/yr less than Descope) [Firebase Auth / Identity Platform SSO assumes 200 SSO users per connection; at 2,000 per connection: Firebase Auth / Identity Platform $149.25/mo, Descope $2,049/mo]; Firebase Auth / Identity Platform wins 100k users · 10 SSO at $304.25/mo ($50,937/yr less than Descope) [Firebase Auth / Identity Platform SSO assumes 200 SSO users per connection; at 2,000 per connection: Firebase Auth / Identity Platform $574.25/mo, Descope $4,549/mo].
Cost by MAU (no SSO)
| Monthly users | Firebase Auth / Identity Platform | Descope |
|---|---|---|
| 10k users | $0 Pay as you go | $249 Pro |
| 50k users | $0 Pay as you go | $2,049 Growth |
| 100k users | $275 Pay as you go | $4,549 Growth |
With enterprise SSO
| Scenario | Firebase Auth / Identity Platform | Descope |
|---|---|---|
| 1k users · no SSO | $0 Pay as you go | $0 Free Forever |
| 10k users · 1 SSO | $2.25 Pay as you go | $249 Pro |
| 50k users · 5 SSO | $14.25 Pay as you go | $2,049 Growth |
| 100k users · 10 SSO | $304.25 Pay as you go | $4,549 Growth |
Cheapest verified plan per vendor, monthly USD list price. SSO users: Amazon Cognito, Supabase Auth and Firebase Auth / Identity Platform bill SAML/OIDC per SSO user, not per connection (first 50 free, then $0.015 per SSO user a month). Their SSO results here assume 200 SSO users per connection (5 connections = 1,000 SSO users). See how 1,000 or 2,000 per connection changes the result or set your own. How we calculate this.
Firebase Auth / Identity Platform
No cost up to 50k MAU (email, phone, anonymous, social), then $0.0055/MAU to 100k, $0.0046 to 1M, $0.0032 to 10M, $0.0025 above. SAML/OIDC: 50 MAU free then $0.015/MAU. SMS (phone sign-in and MFA) billed per message by region (US $0.01); first 10 SMS a day not billed. Sources: cloud.google.com/identity-platform/pricing and firebase.google.com/pricing.
Source: cloud.google.com/identity-platform/pricing · 2026-10-31
Descope
Free Forever $0: 7,500 MAU, 10 tenants, 3 SSO connections, no overages. Pro starts at $249/mo billed annually: 10,000 MAU then $0.05/MAU, 35 tenants then $1, 5 SSO then $50/connection. Growth starts at $799/mo: 25,000 MAU then $0.05/MAU, 100 tenants, 10 SSO then $50, SCIM. Enterprise: contact sales.
Source: www.descope.com/pricing · 2026-10-31
Also see: Firebase Auth / Identity Platform alternatives · Descope alternatives · all vendors by MAU · vs self-hosting (Better Auth / Auth.js)
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