What is App Stack Builder?

App Stack Builder is a free AI-powered tool that helps founders and developers choose the right tech stack for their projects based on budget, app type, team size, and skill level.

What is the best tech stack for SaaS in 2026?

The best tech stack for SaaS in 2026 typically includes Next.js 16 for frontend, Supabase for database and auth, Vercel for hosting, Stripe for payments, and PostHog for analytics. App Stack Builder can generate a personalized recommendation based on your specific budget and requirements.

Is App Stack Builder free to use?

Yes, App Stack Builder is completely free to use. You can generate unlimited tech stack recommendations without any cost.

What types of apps can I build with the recommended stacks?

App Stack Builder supports various app types including SaaS applications, web apps, mobile apps, e-commerce stores, internal tools, and AI/ML products.

How much does a SaaS tech stack cost per month?

A modern SaaS tech stack can cost anywhere from $0-50/month for bootstrapped startups using free tiers, $100-300/month for growth-stage startups, to $500+/month for enterprise-ready infrastructure. App Stack Builder helps you find the best tools within your specific budget.

What is the best tech stack for solo founders?

For solo founders, we recommend Next.js + Vercel (free), Supabase (free tier), Supabase Auth (free), Stripe (pay as you go), and Plausible or PostHog for analytics. This stack can run your entire SaaS for under $50/month.

Can I export my tech stack recommendations?

Yes, you can export your tech stack recommendations as a PDF document or copy them to your clipboard. You can also share a link to your stack with others.

AWS EventBridge vs River: Which is Better in 2026?

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Background Jobs & Workflows

Choosing between AWS EventBridge and River? Both are popular background jobs & workflows tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

AWS EventBridge is for: Teams on AWS who need scheduled tasks and event routing between AWS services and SaaS apps.

River is for: Go teams on PostgreSQL who want jobs enqueued in the same transaction as their data.

Quick verdict

There’s no single winner; pick on your constraint. Choose AWS EventBridge if your stack runs on AWS and you need cron-style schedules for Lambda or other AWS targets. Choose River if your app is written in Go and uses Postgres.

AWS EventBridge vs River — Side by Side

	AWS EventBridge	River
Category	Background Jobs & Workflows	Background Jobs & Workflows
What it is	Managed event bus and scheduler	Open-source job queue library
Languages	Any (AWS SDKs and API)	Go, Java, Ruby, Rust, TypeScript
What it runs on	AWS	Your Postgres or SQLite
How you pay	Per million events or invocations	Free (MPL-2.0); optional Pro subscription
Free access	14M scheduler invocations a month	Full open-source library
Pricing	Free · then usage-based	Free · paid from $125/mo
Starting price	Free tier available	Free tier available
Free tier
Rating	4.2	4.4
Best for	Background Jobs & Workflows — AWS, event routing, scheduling	Background Jobs & Workflows — Go, Postgres, transactional jobs

Pros & Cons

AWS EventBridge

Deep AWS integration
Truly serverless and scalable
Generous scheduler free tier
Cron + event routing in one

AWS lock-in
Pricing has many components
Not a general-purpose worker/queue

River

Idiomatic Go with strong typing
Transactional enqueue on Postgres
No separate broker needed
Active development

Go-first; other languages are newer
Newer than incumbents
Needs Postgres or SQLite

Key Features Compared

AWS EventBridge

Scheduler: 14 million invocations a month free, then $1.00 per million
Custom and partner events on classic buses: $1.00 per million
AWS management events ingested at no charge
Pipes: $0.40 per million requests, billed in 64 KB chunks
API destinations: $0.20 per million events plus data transfer
Archive and replay: $0.10 per GB processed and $0.023 per GB a month stored

River

Open source under the MPL-2.0 license
Enqueues jobs transactionally in your existing database
Runs on Postgres and SQLite
Background jobs for Go, Java, Ruby, Rust and TypeScript, per the project site
River Pro: $125 a month; annual billing saves $300
Pro adds workflows, sequences, batching, global concurrency limits, a dead letter queue and encrypted jobs

Choose AWS EventBridge if…

Your stack runs on AWS and you need cron-style schedules for Lambda or other AWS targets.
You route events between AWS services, SaaS partners and your own apps.
You run many schedules and want 14 million free invocations a month.

AWS EventBridge review & pricing

Choose River if…

Your app is written in Go and uses Postgres.
You want a job to exist only if the transaction that created it commits.
You want workflows and concurrency limits for a flat monthly fee.

River review & pricing

Frequently Asked Questions

Is AWS EventBridge better than River?⌄

What is the difference between AWS EventBridge and River?⌄

What it is — AWS EventBridge: Managed event bus and scheduler. River: Open-source job queue library. Languages — AWS EventBridge: Any (AWS SDKs and API). River: Go, Java, Ruby, Rust, TypeScript. What it runs on — AWS EventBridge: AWS. River: Your Postgres or SQLite. How you pay — AWS EventBridge: Per million events or invocations. River: Free (MPL-2.0); optional Pro subscription. Free access — AWS EventBridge: 14M scheduler invocations a month. River: Full open-source library.

AWS EventBridge vs River: which is cheaper?⌄

AWS EventBridge pricing: Free · then usage-based. River pricing: Free · paid from $125/mo. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, AWS EventBridge or River?⌄

In our catalog, AWS EventBridge rates 4.2 out of 5 and River rates 4.4 out of 5, so River has a slight edge on reviews.

When should I skip both AWS EventBridge and River?⌄

Skip AWS EventBridge if you need a worker queue with job retries and step state. Inngest or Temporal handle that. Skip River if your app is in Node.js. Graphile Worker takes the same Postgres approach.

Sources · tool facts checked November 2026