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

Nango: Pricing, Features & Alternatives

Nango handles OAuth, API keys and token refresh for 1,000+ APIs and lets you expose any integration as a tool through its MCP server. Unlike tool-calling-only platforms it also runs incremental data syncs and verified webhooks, so the same integration can feed RAG and trigger agents. Integrations are written as code, which coding agents can generate. The code is on GitHub under the Elastic License 2.0: source-available, free to self-host and embed, but not open source by the OSI definition and not resellable as a hosted service. The free self-hosted build covers auth and the proxy; syncs, tool calls and the MCP server need a paid plan or Enterprise self-hosting. Cloud: Free (10 connections, hard-capped), Pay-as-you-go $50/month including $50 of credit ($0.29 per connection, $0.72 per compute hour, $0.50 per GB), Enterprise custom with BYOC.

Nango Pricing Plans (2026)

Plan	Price	Highlights
Free	$0	10 connections · 10 compute hours / month · 10 GB data / month
Pay-as-you-goPopular	$50 / month (credit included)	$0.29 per connection · $0.72 per compute hour · $0.50 per GB
Self-hosted (free)	$0 (ELv2)	Auth and proxy only · Your infrastructure
Enterprise	Custom	Full self-hosting or BYOC · MSA and SLA · Volume discounts

Pricing summary: Free · paid from $50/mo. Always confirm current pricing on the official site.

Key Nango Features

$0.29 per connection
$0.72 per compute hour
$0.50 per GB

Pros

+1,000+ APIs with managed OAuth
+Syncs and webhooks as well as tool calls
+Source on GitHub; free self-host for auth

Cons

−Elastic License 2.0, not OSI open source
−Free self-host excludes syncs, tool calls and MCP
−Per-connection pricing grows with users

Best Nango Alternatives

Compare all

Composio

Free · paid from $29/mo

Arcade

Free · paid from $25/mo

ACI.dev

Free · then usage-based

Nango Compared

Nango vs Composio Nango vs Arcade Nango 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.

Nango FAQ

What is Nango used for?⌄

Nango is a agent auth & tool calling tool. Source-available integration platform: managed OAuth for 1,000+ APIs, tool calls and an MCP server, syncs and webhooks. Free self-host for auth and proxy.

Is Nango free?⌄

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

How much does Nango cost?⌄

Nango offers a free tier, with paid plans starting at $50/month. Some plans are usage-based (pay-as-you-go).

What are the best Nango alternatives?⌄

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