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 Memory

The 3 Best Mem0 Alternatives in 2026

Name: App Stack Builder
Availability: InStock

Looking for an alternative to Mem0? Below we compare the best ai agent memory alternatives by pricing, free tiers, and what each is best for — so you can pick the right fit for your budget and stack.

Why look for a Mem0 alternative?

Mem0 is a solid ai agent memory choice, but it isn't the right fit for everyone. The most common reasons teams evaluate alternatives:

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

Mem0 vs Alternatives — Quick Comparison

Tool	Pricing	Rating	Best for
Mem0You searched	Free · paid from $19/mo	4.6	AI Agent Memory — open-source, long-term-memory
1.Zep	Free · paid from $125/mo	4.5	AI Agent Memory — knowledge-graph, temporal
2.Cognee	Free · paid from $1/mo	4.4	AI Agent Memory — knowledge-graph, open-source
3.Supermemory	Free · paid from $19/mo	4.4	AI Agent Memory — context-engine, rag

Top Mem0 Alternatives, Explained

1. Zep

Free tier4.5· Free · paid from $125/mo

Zep stores what agents learn as a temporal knowledge graph, so it knows not just a fact but when it became true and when it stopped being true. Its open-source engine, Graphiti (Apache-2.0, about 32K stars), can be self-hosted on Neo4j, FalkorDB or Neptune; Zep Cloud adds managed users and threads, proprietary extraction and reranking models, a dashboard and governance. Zep Community Edition is deprecated, so self-hosting now means building on Graphiti. Pricing is credit-based (one credit per 350-byte episode; retrieval is free): Free 10K credits a month, Flex $125/month (50K credits), Flex Plus $375/month (200K credits), Enterprise custom with SOC 2 Type II, HIPAA and VPC deployment.

Temporal graph: knows when facts changed
Retrieval does not consume credits
Open-source engine (Graphiti) underneath

Zep pricing & review Mem0 vs Zep

2. Cognee

Free tier4.4· Free · paid from $1/mo

Cognee builds a knowledge graph plus vector index from documents, code and conversations, and gives agents four operations: remember, recall, improve and forget. Answers come with the graph evidence behind them. It can run entirely locally with a bundled extraction model and no LLM key, and has Python, TypeScript and Rust SDKs, a CLI, REST and an MCP server, with plugins for Claude Code and Codex. The library is free to self-host. Cognee Cloud is free for 1M tokens, then $1 per 1M tokens plus $5 per extra workspace; Enterprise is a bring-your-own-cloud engagement.

Graph memory with evidence for every answer
Runs locally without an LLM key
Cheap usage-based cloud

Cognee pricing & review Mem0 vs Cognee

3. Supermemory

Free tier4.4· Free · paid from $19/mo

Supermemory is a memory and context engine you call through an API: add content, then search or fetch a user profile that combines remembered facts with document retrieval. It handles contradictions and forgets expired facts, ingests PDFs, images, video and code, and syncs Google Drive, Gmail, Notion, OneDrive and GitHub. It also ships MCP and plugins that give Claude Code, Cursor and Codex persistent memory. The repository is MIT-licensed and a local server is available, but managed self-hosting is on Scale and Enterprise. Plans are credit-based: Free $5 of usage a month, Pro $19/month ($20 credit), Max $100/month ($130 credit), Scale $399/month ($600 credit, SOC 2, HIPAA, self-hosted option), Enterprise custom.

Memory plus document RAG in one API
Built-in connectors for Gmail, Drive, Notion, GitHub
Low entry price ($19/month)

Supermemory pricing & review 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.

Frequently Asked Questions

What are the best alternatives to Mem0 in 2026?⌄

The best Mem0 alternatives in 2026 are Zep, Cognee, Supermemory. Each is a ai agent memory option you can compare on pricing, free tiers, and features in the table above.

Is there a free alternative to Mem0?⌄

Yes — Zep, Cognee, Supermemory offer free tiers, making them strong free Mem0 alternatives for bootstrapped startups.

Why look for a Mem0 alternative?⌄

A common reason teams switch is graph memory is pro-only ($249/month) on the platform. Beyond that, people compare ai agent memory tools on pricing, specific feature gaps, ease of use, and whether an open-source or free-tier option exists — so they can pick the best fit for their stack and budget.

What is the cheapest Mem0 alternative?⌄

Zep is among the most affordable Mem0 alternatives — free · paid from $125/mo. Check the comparison table above for the full pricing breakdown.

Which Mem0 alternative is rated highest?⌄

Zep is the highest-rated Mem0 alternative in our catalog at 4.5 out of 5, making it a strong pick if you want a well-reviewed option.