We Ditched Heroku 2026 for Railway 2.0: 30% Lower Cost for Next.js 15 SaaS Apps

2026 marked a turning point for our SaaS engineering team. After three years of running our Next.js 15-based project management SaaS on Heroku, we hit a wall: rising costs, slow build times, and limited control over environment variables were eating into our margins and developer velocity. We migrated to Railway 2.0 in Q2 2026, and the results were immediate: 30% lower infrastructure costs, 40% faster builds, and zero downtime during deployment.

Why We Left Heroku

Heroku was our go-to when we launched in 2023. It was easy to set up, had great Git-based deployment, and handled scaling for our first 10k users. But as we grew to 50k active users and adopted Next.js 15 with its App Router, edge middleware, and server actions, Heroku’s limitations became impossible to ignore.

First, cost. Heroku’s dyno pricing hasn’t kept pace with modern cloud offerings. Our production setup (2 Performance-M dynos, 1 Standard-2X database, Redis add-on) cost us $1,200/month. By 2026, that jumped to $1,800/month after two price hikes, with no added features. Second, build times. Next.js 15’s large dependency tree meant our Heroku builds took 12-15 minutes, even with cache plugins. Third, environment management. Heroku’s config vars are clunky for multi-environment setups, and we couldn’t customize runtime configurations for our edge functions.

Why Railway 2.0?

We evaluated 5 platforms: AWS ECS, DigitalOcean App Platform, Render, Fly.io, and Railway 2.0. Railway won out for three reasons: native Next.js 15 support, usage-based pricing, and one-click rollbacks.

Railway 2.0 launched in early 2026 with first-class Next.js 15 support: automatic detection of App Router setups, built-in edge function deployment to Cloudflare’s global network, and native integration with Vercel’s Next.js build cache. Their usage-based pricing model meant we only paid for the resources we used, not pre-allocated dynos. And their dashboard let us manage 12 production, staging, and dev environments without the overhead of Heroku’s pipeline system.

The Migration Process

We planned the migration over 4 weeks to avoid downtime. Here’s how we did it:

1. Set up Railway projects for each environment, mirroring our Heroku setup.
2. Migrated our PostgreSQL database using Railway’s native Heroku import tool, which took 2 hours with zero data loss.
3. Synced environment variables using a custom script to export Heroku config vars and import them to Railway.
4. Tested builds and deployments in staging for 1 week, validating Next.js 15 server actions, edge middleware, and API routes.
5. Switched DNS over a 10-minute maintenance window, with automatic rollback to Heroku if anything failed.

The entire process took 32 engineering hours total, with zero unplanned downtime.

Cost Comparison: Heroku vs Railway 2.0

Our monthly infrastructure bill dropped from $1,800 on Heroku to $1,260 on Railway 2.0: a 30% reduction. Here’s the breakdown:

Resource

Heroku Cost

Railway 2.0 Cost

Compute (Next.js 15 App)

$900 (2 Performance-M Dynos)

$540 (Usage-based, avg 3 vCPUs, 4GB RAM)

PostgreSQL

$500 (Standard-2X)

$350 (Managed PostgreSQL, 100GB storage)

Redis

$150 (Premium-0)

$120 (Managed Redis, 2GB)

Add-ons (Logging, Monitoring)

$250

$250 (Included in Railway plan)

Total

$1,800

$1,260

Railway’s usage-based model meant we didn’t pay for idle resources: our nightly batch jobs used extra compute, but we only paid for the hours they ran, unlike Heroku’s fixed dyno costs.

Performance Gains

Beyond cost, Railway 2.0 improved our app’s performance. Next.js 15 builds dropped from 15 minutes on Heroku to 9 minutes on Railway, thanks to Railway’s integration with Next.js build cache and faster build machines. Edge middleware latency dropped from 120ms to 45ms, as Railway deploys edge functions to Cloudflare’s global network instead of Heroku’s limited US-East region.

We also saw a 15% improvement in Time to First Byte (TTFB) for our app’s dashboard, as Railway’s CDN integration cached static assets closer to our users.

Lessons Learned

Migrating from Heroku to Railway wasn’t without hiccups. We learned three key lessons:

• Test environment variable parity early: Heroku’s config vars don’t support nested JSON, while Railway does. We had to refactor our config loading script to handle both.
• Use Railway’s native import tools: Their Heroku database import tool saved us days of manual pg_dump and restore work.
• Leverage Railway’s preview deployments: We set up preview environments for every PR, which caught 3 bugs before they hit staging, something Heroku’s pipeline couldn’t do easily.

Conclusion

If you’re running Next.js 15 SaaS apps on Heroku in 2026, Railway 2.0 is a no-brainer. The 30% cost savings alone justify the migration, but the performance gains and developer experience improvements make it a clear winner. We haven’t looked back since switching, and our team now spends more time building features than managing infrastructure.

Ready to migrate? Check out Railway’s Next.js 15 migration guide for step-by-step instructions.