Firebase Authentication

Google-backed auth with generous free tier for mobile and web

Courier vs Firebase Authentication: Full Comparison (2026)

Pricing, features, scores, and a clear verdict on which one is right for you.

The bottom line

Courier positions itself as "send notifications the smarter way" while Firebase Authentication goes after "google-backed auth with generous free tier for mobile and web" — so the right pick depends on which problem you're actually solving. Both use freemium pricing, but Courier charges per message while Firebase Authentication charges per mau — a meaningful difference for larger teams. Firebase Authentication (founded 2011) has had more time to build out its ecosystem and integrations, while Courier (2019) tends to move faster on modern UX and newer workflows.

At a glance

	Courier	Firebase Authentication
Our score	80/100	76/100
Starting price	Free	Free
Free tier	Yes	Yes
Best for	Send notifications the smarter way	Google-backed auth with generous free tier for mobile and web

Pricing comparison

Courier

Free tier available

FreeFree

Starter$99/mo

Growth$259/mo

Pricing verified 2026-04-16

Firebase Authentication

Free tier available

Spark (Free)Free

Blaze (Pay-as-you-go)$null/mo

Pricing verified 2026-04-16

Calculate your cost

How many developers?10

1500

CourierUnknown

Contact sales

Firebase AuthenticationUnknown

Contact sales

Try Courier free →Try Firebase Authentication free →

Feature comparison

core

Feature	Courier	Firebase Authentication
Multi-channel notifications	Yes	No
Template editor	Yes	No
User preferences	Yes	No
Routing rules	Yes	No
Notification designer	Yes	No
Email/password	No	Yes
Google OAuth	No	Yes
Apple OAuth	No	Yes
Phone SMS	No	Yes
Anonymous auth	No	Yes

advanced

Feature	Courier	Firebase Authentication
A/B testing notifications	Yes	No
Analytics	Yes	No
Segment integration	Yes	No
Automations	Yes	No
150+ integrations	Yes	No
Multi-tenancy	No	Blaze
SAML SSO	No	Blaze ($0.015/MAU)
Custom claims	No	Yes
App Check	No	Yes
Blocking functions	No	Yes

integrations

Feature	Courier	Firebase Authentication
Twilio	Yes	No
SendGrid	Yes	No
Slack	Yes	No
PagerDuty	Yes	No
Segment	Yes	No
Firebase (all products)	No	Yes
Google Cloud	No	Yes
Flutter	No	Yes
Android/iOS SDKs	No	Yes
Web SDK	No	Yes

Ratings breakdown

Courier

Ease of use

8/10

Value for money

8/10

Features

8/10

Support

8/10

Firebase Authentication

Ease of use

8/10

Value for money

9/10

Features

7/10

Support

6/10

What the data tells us

Key capabilities you'd miss

Choosing Courier means going without Email/password, Google OAuth, Apple OAuth (which Firebase Authentication offers). Choosing Firebase Authentication means losing Multi-channel notifications, Template editor, User preferences. These are the features that typically drive the final decision — check whether your workflow depends on any of them before committing.

What company size tells you

Courier (51-200 employees) has the engineering bench to ship features across many fronts but may iterate slower on individual requests. Firebase Authentication (100,000+ employees) typically ships faster on its core product but may lag on peripheral features. Consider which matters more for your roadmap.

Choose Courier if...

You want a free tier to get started
You value an intuitive, easy-to-use interface
Getting strong value for money is a priority

Try Courier free →

Choose Firebase Authentication if...

You want a free tier to get started
You value an intuitive, easy-to-use interface
Getting strong value for money is a priority

Try Firebase Authentication free →

Frequently asked questions

Is Courier or Firebase Authentication better?

Courier scores 80/100 compared to Firebase Authentication's 76/100 on VendorVS. However, the best choice depends on your needs — Courier excels at ease of use (8/10) while Firebase Authentication scores 8/10.

How much does Courier cost compared to Firebase Authentication?

Courier starts at free (free tier available). Firebase Authentication starts at free (free tier available). Courier is the more affordable option.

Does Courier or Firebase Authentication have a free plan?

Yes, both Courier and Firebase Authentication offer free tiers, so you can try each before committing to a paid plan.

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