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Authentication
Firebase Auth Integration Services
Firebase Auth integrated for mobile-first apps with Google ecosystem in 5 days.
★ 4.9 · 76 reviewsTop Rated Upwork · 100% JSSStarting from $499
Firebase Authentication is Google's auth service powering 3M+ apps — favored for mobile-first products (Flutter / React Native), Google ecosystem integration (Google Sign-In, Firestore, Analytics), and lowest-cost B2C auth. We integrate Firebase Auth for B2C apps, mobile-first SaaS, and Indian apps where phone OTP is the dominant auth method. Especially valuable for cost-conscious projects with high user volume.
Why Hire Us
Why Teams Choose Us for Firebase Auth Integration
Specifics that matter when you are betting your business on a Firebase Auth integration.
01
Firebase Auth + Flutter / React Native specialists
Firebase shines on mobile because Google ships first-class SDKs. We have built 30+ mobile apps using Firebase Auth with proper SDK integration, deep linking for password reset, and biometric auth wrapping.
02
Phone OTP for India (essential for B2C apps)
In India, phone OTP is the dominant auth method (vs email in US). Firebase phone auth handles SMS delivery via Google's infrastructure (no MSG91 needed). For India B2C, phone OTP is mandatory.
03
Lowest-cost auth at scale (free tier covers most apps)
Firebase Auth is free for up to 50K MAU with email/password + social, then $0.01-0.06 per verification. For B2C apps with 100K-1M users, often the cheapest auth option.
04
Tight Firebase ecosystem (Firestore + Functions + Analytics)
If you use Firestore, Cloud Functions, or Firebase Analytics — Firebase Auth integrates seamlessly. user.uid is the foreign key across all Firebase services. Massive dev velocity for Firebase-native apps.
What's Included
Everything You Get in a Firebase Auth Integration
No fine print, no surprise add-ons. Every line below is included in our scope.
Firebase project setup + Authentication enabled
Email/password + Google + Apple Sign-In
Phone OTP for India / global SMS auth
Anonymous auth (for guest checkout flows)
Custom claims for role-based access
Refresh token + ID token verification (server-side)
Migration from another auth (if applicable)
Firestore security rules tied to auth
Mobile SDK integration (Flutter / React Native / native iOS/Android)
Web JS SDK integration (Next.js / React)
60 days post-launch support
Our Process
How We Ship Your Firebase Auth Integration
Day-by-day, with milestones you can hold us to.
1
Day 1
Firebase project setup + auth methods enabled
Create project, configure auth providers, set up app credentials.
2
Days 2-3
Mobile SDK + biometric wrapping
Flutter / React Native SDK integration with biometric auth (FaceID / fingerprint).
3
Day 4
Phone OTP + Google Sign-In + Apple Sign-In
Configure phone OTP for India, Google + Apple OAuth, deep linking for password reset.
4
Day 5
Server-side ID token verification + Firestore rules
Backend verification of Firebase ID tokens; security rules tied to auth.uid. Production go-live; 60-day support starts.
Transparent Pricing
Firebase Auth Integration Pricing
Fixed-price tiers in USD (global pricing). Equivalents in other currencies shown for reference. No hourly billing surprises.
Starter
For small teams shipping fast
$499 – $999
₹25K for India · AED 1,800 for UAE
3–5 days- Firebase Auth setup
- Email/password + Google Sign-In
- Mobile SDK (Flutter or RN)
- Server-side ID token verification
- 30 days support
⭐ Most Picked
Pro
For growing businesses needing the full feature set
$1,299 – $2,599
₹60K for India · AED 4,500 for UAE
6–9 days- Phone OTP for India + global
- Apple Sign-In + biometric wrapping
- Custom claims for roles
- Anonymous auth for guest flows
- Firestore security rules
- 60 days support
Enterprise
For complex flows, marketplaces, and scale
Custom Quote
Priced per scope
12+ days- Migration from another auth (Auth0 / Cognito)
- Multi-tenant via custom claims
- Custom auth flows
- Dedicated SLA
- Quarterly review
Tech Stacks
We Integrate Firebase Auth Across Every Major Stack
Your tech stack does not change our pricing. Pick yours below to see relevant work.
Industries
Trusted by Firebase Auth Users in These Industries
Industry-specific patterns, compliance, and proven flows.
Case Studies
Real Firebase Auth Integrations We Shipped
Specific outcomes, not vague testimonials.
Food Delivery
Food delivery app — Firebase Auth phone OTP for 8M users
Built Firebase phone OTP auth for India food delivery app with 8M users. Auth cost ~$2K/month at this scale (vs $14K on Auth0). 99.4% OTP delivery via Google's infra.
$12K/mo saved
EdTech
EdTech mobile-first — Flutter + Firebase Auth + Firestore
Built complete mobile-first EdTech app on Flutter + Firebase Auth + Firestore. 3-week build vs 8-week estimate on custom backend. Now serving 1.4M MAU.
3 weeks to launch
Healthcare
Healthcare telemedicine — Anonymous auth for guest consultation
Built telemedicine flow with Firebase Anonymous Auth for guest patients (try free consultation), then upgrade to email/phone for follow-ups. Conversion to registered: 47%.
47% guest→registered
Why Us vs Alternatives
Why Codingclave for Firebase Auth Integration
A side-by-side comparison vs hiring a freelancer or another agency.
| Feature | Codingclave (Us) | Freelancer | Other Agency |
|---|---|---|---|
| Mobile SDK quality | Flutter + RN + native shipped | Web-only | Charged per platform |
| Phone OTP for India | 99.4% delivery configured | External SMS provider needed | External SMS |
| Firebase ecosystem (Firestore/Functions) | Tight integration shipped | Disconnected | Charged extra |
| Time to launch | 5 working days | 14-21 days | 21-30 days |
| Pricing transparency | Fixed price | Hourly | Inflated |
★ 4.9
76 reviews
Talk to the Founder
Talk Directly to Ashish for Your Firebase Auth Integration
I personally review every Firebase Auth integration we ship — scope, pricing, and delivery timeline. With 200+ projects shipped since 2017, a 100% Job Success Score on Upwork, and 4.9★ on Google, my reputation is on every integration we deliver. If something breaks at 2 AM, I am the one fixing it.
200+
Projects
Since 2017
8 yrs experience
100%
Upwork JSS
< 2 hrs
Reply time
Lucknow, India · Available for calls in IST, GST, BST, EST · Free consultation
FAQ
Firebase Auth Integration — Common Questions
Everything teams ask before signing on.
Starts at $499 for Firebase Auth + email/password + Google Sign-In + mobile SDK. Pro at $1,299-$2,599 adds phone OTP, Apple Sign-In, biometric, custom claims, anonymous auth. Enterprise (migrations, multi-tenant) is custom — typically $3,000-$8,000.
Firebase Auth: best for mobile-first apps in Firebase ecosystem (Firestore + Functions). Cheapest at scale for B2C. Clerk: best for Next.js / React web apps with modern UX. Auth0: best for enterprise B2B with SAML SSO. For India mobile apps with phone OTP, Firebase usually wins on cost + simplicity.
Basic: 3-5 days. Pro tier with phone OTP + Apple Sign-In + biometric + Firestore rules: 6-9 days. Migration from another auth: 12-21 days.
Yes — Firebase routes India SMS via Google's infrastructure with 99%+ delivery. Note: Firebase phone auth has rate limits (per IP + per phone) for abuse prevention. We tune these correctly to balance security + UX.
Yes — both are first-class supported. Flutter via firebase_auth package, React Native via @react-native-firebase/auth. We add biometric wrapping (local_auth in Flutter, react-native-touch-id in RN) for FaceID / fingerprint login.
Yes via Custom Claims — set custom JWT claims (role, orgId, tier) on each user; check claims server-side or in Firestore security rules. Less polished than Auth0 Organizations but adequate for B2C-like SaaS with simple role models.
Pay-as-you-go at $80/hr or SLA at $250/month with 4-hour response. ~50% of clients move to SLA.
Let's Talk
Ready to Build Something Great?
Talk to Ashish Sharma. Share your Firebase Auth integration scope, get a fixed-price quote in 24 hours.
Reply Within 2 Hours
We respond fast. No waiting days for a callback or email. Get answers quickly.
100% Free Consultation
Tell us your idea. We'll give you an honest estimate, tech recommendations, and a roadmap — free.
200+ Projects Shipped
From government websites to SaaS products — we've delivered at every scale since 2017.
★4.9
100%
Upwork JSS
200+
Projects