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 Auth & Tool CallingFree tier

Composio: Pricing, Features & Alternatives

Composio lets an agent act inside apps such as Gmail, Slack, GitHub, Salesforce and Notion on behalf of each end user. It runs the OAuth flows, stores and refreshes tokens, and exposes each app as ready-made tools for any framework or MCP client, plus triggers that push app events back to the agent. It states SOC 2 Type II and ISO 27001. The SDK is MIT-licensed; the platform is hosted. Pricing changed for signups from August 15, 2026: Hobby is free with 100,000 tool calls and 50,000 trigger events a month (usage pauses at the cap), Pro is $29/month including $29 of usage, then $0.0003 per tool call and $0.003 per trigger event, and Enterprise is custom with SSO, BAA and zero data retention included. Existing customers keep their old plan until December 31, 2026.

Composio Pricing Plans (2026)

Plan	Price	Highlights
Hobby	$0	100K tool calls / month · 50K trigger events / month · Unlimited connected accounts
ProPopular	$29 / month + usage	$29 usage credit included · $0.0003 per tool call · $0.003 per trigger event
Enterprise	Custom	SSO / SCIM · BAA and zero data retention included · Customer-managed keys

Pricing summary: Free · paid from $29/mo. Always confirm current pricing on the official site.

Key Composio Features

$29 usage credit included
$0.0003 per tool call
$0.003 per trigger event
Unlimited team members, spend controls

Pros

+Largest catalog: 1,500+ apps with managed OAuth
+Generous free tier (100K tool calls)
+SOC 2 Type II and ISO 27001

Cons

−Hosted only; no self-host option published
−Compliance add-ons (BAA, IP allowlist) are billed per call on Pro
−Pricing changed in Aug 2026, so older guides quote the wrong numbers

Best Composio Alternatives

Compare all

Arcade

Free · paid from $25/mo

Nango

Free · paid from $50/mo

ACI.dev

Free · then usage-based

Composio Compared

Composio vs Arcade Composio vs Nango Composio vs ACI.dev

In-depth guideComposio vs Arcade (2026): Agent Auth & Tool Calling, Plus Open-Source Nango and ACI.devYour agent has to act inside Gmail, Slack and Salesforce as each of your users, without the model seeing a token. Composio and Arcade compared with Nango and ACI.dev on OAuth handling, licence and cost at 50 and 1,000 users.

Composio FAQ

What is Composio used for?⌄

Composio is a agent auth & tool calling tool. Managed tool calling and OAuth for AI agents: 1,500+ app integrations, triggers and an MCP gateway, with a free tier of 100K tool calls a month.

Is Composio free?⌄

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

How much does Composio cost?⌄

Composio offers a free tier, with paid plans starting at $29/month. Some plans are usage-based (pay-as-you-go).

What are the best Composio alternatives?⌄

Popular Composio alternatives include Arcade, Nango, ACI.dev. Compare pricing and features on our Composio alternatives page.