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.

AI Agent MemoryFree tier

Mem0: Pricing, Features & Alternatives

Mem0 adds long-term memory to an existing agent: it extracts facts from conversations and retrieves the relevant ones with combined semantic, keyword and entity search. It is the most-starred project in the category (about 67K GitHub stars) and runs as a Python or npm library, a self-hosted Docker server or a managed platform. In April 2026 Mem0 reported 92.5 on LoCoMo and 94.4 on LongMemEval for its managed platform; those are its own numbers, and it says open-source results will be similar but not identical. Platform: Hobby free (10K add and 1K retrieval requests a month), Starter $19/month, Pro $249/month with graph memory, Enterprise custom with on-prem.

Mem0 Pricing Plans (2026)

Plan	Price	Highlights
Open source	$0 (Apache-2.0)	Library or self-hosted server · Your own LLM and vector store
Hobby	$0	10K add requests / month · 1K retrieval requests / month · Unlimited end users
StarterPopular	$19 / month	50K add requests / month · 5K retrieval requests / month
Pro	$249 / month	500K add / 50K retrieval requests · Graph memory · Unlimited projects

Pricing summary: Free · paid from $19/mo. Always confirm current pricing on the official site.

Key Mem0 Features

50K add requests / month
5K retrieval requests / month

Pros

+Apache-2.0 with the largest community in the category
+Drops into an existing agent as a library
+Cheap managed tiers from $19/month

Cons

−Graph memory is Pro-only ($249/month) on the platform
−Benchmark figures are self-reported
−Retrieval caps on low tiers are tight

Best Mem0 Alternatives

Compare all

Zep

Free · paid from $125/mo

Cognee

Free · paid from $1/mo

Supermemory

Free · paid from $19/mo

Mem0 Compared

Mem0 vs Zep Mem0 vs Cognee Mem0 vs Supermemory

In-depth guideBest AI Agent Memory 2026: Mem0 vs Zep vs Cognee vs SupermemoryYour agent forgets everything when the chat ends. Two open-source memory layers and two managed services compared on how they store memory, what they cost for 1,000 users, and why every vendor claims the top benchmark score.

Mem0 FAQ

What is Mem0 used for?⌄

Mem0 is a ai agent memory tool. Open-source (Apache-2.0) memory layer for AI agents: remembers users, sessions and agent state across conversations. Self-host or use the managed platform.

Is Mem0 free?⌄

Yes — Mem0 has a free tier you can start with, and paid plans for more usage and features.

How much does Mem0 cost?⌄

Mem0 offers a free tier, with paid plans starting at $19/month.

What are the best Mem0 alternatives?⌄

Popular Mem0 alternatives include Zep, Cognee, Supermemory. Compare pricing and features on our Mem0 alternatives page.