Firebase Authentication Limits

The following auth operations have limitations on the frequency you can perform them. These limitations can change without notice. Contact Firebase support to discuss special use cases.

Account creation and deletion limits

Operation	Limit
New account creation	100 accounts/IP address/hour
Account deletion	10 accounts/second

Accounts per project

Account type	Limit
Anonymous user accounts	100 million
Registered user accounts	Unlimited

Email limits

Operation	Spark plan limit	Flame and Blaze plan limit
Address verification emails	1000 emails/day	100,000 emails/day
Address change emails	1000 emails/day	10,000 emails/day
Password reset emails	150 emails/day	10,000 emails/day
Email link sign-in emails	2000 emails/day	25,000 emails/day

Phone number sign-in limits

Operation	Limit
User sign-ins	See Pricing
Verification code SMS messages	50 messages/IP address/minute, 500 messages/IP address/hour
Verification requests	150 requests/IP address/hour

API limits

Operation	Limit
Operations per service account	500 requests/second
Operations per project	1000 requests/second, 10 million requests/day

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上次更新：四月 2, 2019。