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.

Agent FrameworkFree tier

OpenAI Agents SDK: Pricing, Features & Alternatives

The OpenAI Agents SDK is a lightweight, production-ready framework (the successor to Swarm) for building agentic apps with minimal boilerplate. Its core primitives are agents, tools, handoffs between agents, and guardrails, with built-in tracing. Available for Python and JavaScript/TypeScript, it is model-agnostic but pairs tightly with OpenAI models. Ideal for straightforward single-agent or small multi-agent request/response flows. Free and open-source.

OpenAI Agents SDK Pricing Plans (2026)

Plan	Price	Highlights
Open SourcePopular	$0 (open source)	Agents, tools & handoffs · Guardrails & validation · Built-in tracing

Pricing summary: Free. Always confirm current pricing on the official site.

Key OpenAI Agents SDK Features

Agents, tools & handoffs
Guardrails & validation
Built-in tracing
Python & JS/TS
Minimal boilerplate

Pros

+Very low boilerplate, fast to ship
+Production-ready with tracing
+Backed by OpenAI
+Python & TypeScript support

Cons

−Best experience tied to OpenAI models
−Lighter on complex orchestration than LangGraph

Best OpenAI Agents SDK Alternatives

Compare all

Mastra

Free

Pydantic AI

Free

Vercel AI SDK

Free

LangChain

Free · paid from $39/mo

LangGraph

Free

LlamaIndex

Free

OpenAI Agents SDK Compared

OpenAI Agents SDK vs Mastra OpenAI Agents SDK vs Pydantic AI OpenAI Agents SDK vs Vercel AI SDK OpenAI Agents SDK vs LangChain OpenAI Agents SDK vs LangGraph OpenAI Agents SDK vs LlamaIndex

OpenAI Agents SDK FAQ

What is OpenAI Agents SDK used for?⌄

OpenAI Agents SDK is a agent framework tool. OpenAI's lightweight, production-ready agent SDK — minimal-boilerplate agents, tools, handoffs, and guardrails.

Is OpenAI Agents SDK free?⌄

Yes — OpenAI Agents SDK has a free tier you can start with, and paid plans for more usage and features.

How much does OpenAI Agents SDK cost?⌄

OpenAI Agents SDK is free to use.

What are the best OpenAI Agents SDK alternatives?⌄

Popular OpenAI Agents SDK alternatives include Mastra, Pydantic AI, Vercel AI SDK, LangChain, LangGraph. Compare pricing and features on our OpenAI Agents SDK alternatives page.

Not sure if OpenAI Agents SDK fits your stack?

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