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.

LLM ProviderFree tier

Grok API (xAI): Pricing, Features & Alternatives

The Grok API by xAI gives you access to Grok-2 and Grok-3 models, notable for real-time web search integration, a 131K token context window, and competitive per-token pricing. Grok-2 is OpenAI-API-compatible, making it easy to drop in as a replacement. Well-suited for apps that need up-to-date information without RAG, or builders wanting a ChatGPT-level model at lower cost. Comes with a free tier via the xAI developer program.

Grok API (xAI) Pricing Plans (2026)

Plan	Price	Highlights
Free TierPopular	Free (rate-limited)	Grok-2 model access · 25 requests/hour (rate-limited) · 131K token context window
Pay As You Go	Usage-based (per token)	Grok-2 (fast, cost-effective) · Grok-3 (most capable) · Grok-3 Mini (lightweight)

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

Key Grok API (xAI) Features

Grok-2 model access
25 requests/hour (rate-limited)
131K token context window
Real-time web search integration
OpenAI-compatible API
Good for prototyping

Pros

+Real-time web search built in
+OpenAI-compatible — easy migration
+Competitive pricing vs GPT-4
+Free tier available for prototyping

Cons

−Smaller ecosystem than OpenAI
−Newer — fewer community resources
−Rate limits on free tier

Best Grok API (xAI) Alternatives

Compare all

Google Gemini API

Free

Mistral AI API

Free

Anthropic Claude API

Usage-based

OpenAI API

Usage-based

Grok API (xAI) Compared

Grok API (xAI) vs Anthropic Claude API Grok API (xAI) vs OpenAI API Grok API (xAI) vs Google Gemini API Grok API (xAI) vs Mistral AI API

Grok API (xAI) FAQ

What is Grok API (xAI) used for?⌄

Grok API (xAI) is a llm provider tool. xAI's Grok API — real-time internet access, large context window, and competitive pricing for AI-powered apps.

Is Grok API (xAI) free?⌄

Yes — Grok API (xAI) has a free tier you can start with, and paid plans for more usage and features.

How much does Grok API (xAI) cost?⌄

Grok API (xAI) is free to use, with usage-based pricing on some features.

What are the best Grok API (xAI) alternatives?⌄

Popular Grok API (xAI) alternatives include Google Gemini API, Mistral AI API, Anthropic Claude API, OpenAI API. Compare pricing and features on our Grok API (xAI) alternatives page.

Not sure if Grok API (xAI) fits your stack?

Get a free, AI-powered tech stack tailored to your budget, app type, and team size — including the best llm provider pick for you.

Build my stack free