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.

AutoGen vs Langflow: Which is Better in 2026?

Name: App Stack Builder
Availability: InStock

Agent Framework

Choosing between AutoGen and Langflow? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

AutoGen is for: Teams that already run AutoGen and need to maintain it while they plan a move to Microsoft Agent Framework.

Langflow is for: Teams who want to build and test agent and RAG flows visually, then serve them as APIs or MCP servers.

Quick verdict

There’s no single winner; pick on your constraint. Choose AutoGen if you already run AutoGen in production and need it to keep working while you migrate. Choose Langflow if you want to prototype agent or RAG flows visually before writing code.

AutoGen vs Langflow — Side by Side

	AutoGen	Langflow
Category	Agent Framework	Agent Framework
What it is	Code library: multi-agent conversation framework	Visual builder for agent and RAG flows
Languages	Python, .NET	Visual editor; Python components
Licence	MIT (code)	MIT
Managed / paid option	None	Self-host or Langflow Desktop
Project status	Maintenance mode; successor is Microsoft Agent Framework	Active; 1.x
Pricing	Free	Free
Starting price	Free tier available	Free tier available
Free tier
Rating	4.4	3.9
Best for	Agent Framework — existing AutoGen projects, migration path	Agent Framework — visual builder, RAG prototyping, MCP servers

Pros & Cons

AutoGen

Backed by Microsoft Research
Strong multi-agent conversation model
Completely free
Active development

APIs have shifted between versions
Python-centric

Langflow

Fastest way to prototype a chain visually
Exports to code rather than trapping you
Free and self-hostable

Visual editing gets unwieldy past a certain size
Versioning a flow is harder than versioning code

Key Features Compared

AutoGen

Multi-agent conversations and group-chat orchestration
Python and .NET libraries
In maintenance mode: bug fixes, security patches and docs only, community-managed
Microsoft Agent Framework 1.0 (April 2026) is the successor, with a migration guide
AG2 is a separate community fork led by AutoGen’s original creators

Langflow

Drag-and-drop builder for agents and RAG flows
Flows served as APIs, and exposable as MCP servers
Works as an MCP client as well
Self-host it, or run Langflow Desktop locally
Owned by IBM through its DataStax acquisition
MIT licence

Choose AutoGen if…

You already run AutoGen in production and need it to keep working while you migrate.
You’re studying multi-agent conversation patterns from the original research project.

AutoGen review & pricing

Choose Langflow if…

You want to prototype agent or RAG flows visually before writing code.
Non-developers on your team need to edit flows.
You want flows exposed as APIs or MCP servers without extra code.

Langflow review & pricing

Frequently Asked Questions

Is AutoGen better than Langflow?⌄

What is the difference between AutoGen and Langflow?⌄

What it is — AutoGen: Code library: multi-agent conversation framework. Langflow: Visual builder for agent and RAG flows. Languages — AutoGen: Python, .NET. Langflow: Visual editor; Python components. Licence — AutoGen: MIT (code). Langflow: MIT. Managed / paid option — AutoGen: None. Langflow: Self-host or Langflow Desktop. Project status — AutoGen: Maintenance mode; successor is Microsoft Agent Framework. Langflow: Active; 1.x.

AutoGen vs Langflow: which is cheaper?⌄

AutoGen pricing: Free. Langflow pricing: Free. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, AutoGen or Langflow?⌄

In our catalog, AutoGen rates 4.4 out of 5 and Langflow rates 3.9 out of 5, so AutoGen has a slight edge on reviews.

When should I skip both AutoGen and Langflow?⌄

Skip AutoGen if you’re starting a new project. AutoGen gets no new features; Microsoft points new work to Microsoft Agent Framework. Skip Langflow if your flows will grow large and need code review and versioning. A code library such as LangGraph is easier to manage.

Sources · tool facts checked October 2026