Free NotebookLM Alternatives
Eight verified free NotebookLM alternatives - ChatGPT's file uploads and seven free vector databases and embedding APIs - with limits and card rules.
NotebookLM, which Google’s help center now documents as Gemini Notebook, is a research notebook: upload PDFs, websites, YouTube links, audio or Google Docs, then chat over the sources with in-line citations and turn them into study guides, mind maps or audio overviews. Its free usage is compute-based and refreshes every 5 hours until you reach a weekly limit - but the standard limits that come without a paid Google AI plan are not published as numbers, and Google states they may change. The free alternatives below play for durability and control instead: ChatGPT’s free plan for chat over limited file uploads, and seven free building blocks - Postgres with pgvector, managed vector databases, and embedding APIs - to run a NotebookLM-style assistant of your own. Every row is a live offer from the same catalog as the free AI coding tools directory; the free vector databases guide and the free embeddings API guide cover the build steps.
| Option | What is free | Card | The catch |
|---|---|---|---|
| ChatGPT Free Plan | Free web search, file and image analysis, image generation, and writing tools | no card | Catch: Only everyday text chats are unlimited; file uploads, image generation, voice, and deep research have separate usage limits. |
| Supabase Free Plan | Free Postgres with pgvector, auth, storage and edge functions on 2 projects | no card | Catch: Free projects are paused after 1 week of inactivity, the database is capped at 500 MB, and there are no automatic backups. |
| Weaviate Cloud Free Plan | Always-free managed Weaviate cluster: 100K objects, embeddings included | no card | Catch: One cluster per user with a single collection and 100,000 objects; no backups or replication on the free plan. |
| Pinecone Starter Plan | Free Pinecone vector database: 2 GB storage, 5 serverless indexes | no card | Catch: AWS us-east-1 only, 1 project and 2 users, community support only; going past the monthly read/write units means upgrading to Builder ($20/month flat) or Standard ($50/month minimum). |
| Qdrant Cloud Free Tier | Free-forever Qdrant vector database cluster, 1 GB RAM, no credit card | no card | Catch: Single node only, no high availability or automatic backups; unused free clusters are suspended after 1 week and deleted after 4 weeks of inactivity. |
| Zilliz Cloud Free Cluster | Free managed Milvus cluster: 5 GB storage, 2.5M vCUs per month | no card | Catch: Up to 5 collections and 2.5M vCUs a month; advanced features need the Serverless or Dedicated trial. |
| Voyage AI Free Embedding and Reranking Tokens | Voyage AI by MongoDB gives every account 200M free tokens on most models | no card | Catch: Without a payment method you are held to 3 requests and 10K tokens a minute; the published 2,000 RPM limits need a card on file (Usage Tier 1). Older model generations get no free tokens. |
| Mixedbread Free Starter Credits | $5 in one-time Mixedbread usage credits, no credit card | no card | Catch: The $5 credits are one-time only with no monthly renewal; once spent you must add credits from billing settings or upgrade to Scale. |
The 8 options, in detail
ChatGPT Free Plan
Free web search, file and image analysis, image generation, and writing tools
- Unlimited text chats (model not specified)
- Limited file uploads
- Limited image generation
- Limited voice chats
Catch: Only everyday text chats are unlimited; file uploads, image generation, voice, and deep research have separate usage limits.
Supabase Free Plan
Free Postgres with pgvector, auth, storage and edge functions on 2 projects
- 2 active free projects
- 500 MB database size per project
- Shared CPU, 500 MB RAM
- 50,000 monthly active users
Catch: Free projects are paused after 1 week of inactivity, the database is capped at 500 MB, and there are no automatic backups.
Weaviate Cloud Free Plan
Always-free managed Weaviate cluster: 100K objects, embeddings included
- 1 cluster per user (shared deployment)
- 100,000 objects
- 1 GB memory, 10 GB disk
- 1 collection, up to 3 tenants
Catch: One cluster per user with a single collection and 100,000 objects; no backups or replication on the free plan.
Pinecone Starter Plan
Free Pinecone vector database: 2 GB storage, 5 serverless indexes
- Up to 2 GB storage, 5 serverless indexes, 100 namespaces per index
- Up to 1M read units and 2M write units per month
- Up to 1 GB egress per month
- 1 project, up to 2 users
Catch: AWS us-east-1 only, 1 project and 2 users, community support only; going past the monthly read/write units means upgrading to Builder ($20/month flat) or Standard ($50/month minimum).
Qdrant Cloud Free Tier
Free-forever Qdrant vector database cluster, 1 GB RAM, no credit card
- 1 single-node cluster: 0.5 vCPU, 1 GB RAM, 4 GB disk
- About 1M vectors at 768 dimensions (vendor estimate)
- Limited choice of cloud providers and regions
- Only manual snapshots and restores via API
Catch: Single node only, no high availability or automatic backups; unused free clusters are suspended after 1 week and deleted after 4 weeks of inactivity.
Zilliz Cloud Free Cluster
Free managed Milvus cluster: 5 GB storage, 2.5M vCUs per month
- 5 GB storage (about 1M 768-dim vectors)
- 2.5M vCUs per month
- Up to 5 collections
- Community support (Slack)
Catch: Up to 5 collections and 2.5M vCUs a month; advanced features need the Serverless or Dedicated trial.
Voyage AI Free Embedding and Reranking Tokens
Voyage AI by MongoDB gives every account 200M free tokens on most models
- 200M free tokens each: voyage-4-large, voyage-4, voyage-4-lite, voyage-code-4, voyage-context-4, rerank-3, rerank-3-lite
- 50M free tokens: voyage-finance-2, voyage-law-2, voyage-code-2
- voyage-multimodal-3.5: 200M text tokens and 150B pixels
- No free tokens for older models (voyage-3.x, voyage-context-3, voyage-multimodal-3, rerank-2.x)
Catch: Without a payment method you are held to 3 requests and 10K tokens a minute; the published 2,000 RPM limits need a card on file (Usage Tier 1). Older model generations get no free tokens.
Mixedbread Free Starter Credits
$5 in one-time Mixedbread usage credits, no credit card
- $5 one-time credits per workspace
- 100 queries/minute; 6,000 uploads/minute for ingestion
- 3 Stores on the Starter tier (the Scale tier lists 10,000)
- 3 workspace users
Catch: The $5 credits are one-time only with no monthly renewal; once spent you must add credits from billing settings or upgrade to Scale.
Free forever by self-hosting
Open-source projects that do the same job on your own hardware, with no quota.
- Open WebUI (Open WebUI License (branding clause))
- Qdrant (Apache-2.0)
- Text Embeddings Inference (Apache-2.0) - CPU, or an NVIDIA GPU with CUDA compute capability 7.5 or newer
Frequently asked questions
- Is NotebookLM free?
- Yes, with a Google account. Google’s help center now documents the product as Gemini Notebook; usage limits are compute-based and refresh every 5 hours until you reach a weekly limit. Without a paid Google AI plan you get the standard limits, and Google does not publish a number for them - only that limits may change. Details were read from Google’s help center on November 1, 2026.
- What is the best free alternative to NotebookLM?
- For chat grounded in working with sources rather than building anything, ChatGPT’s free plan: unlimited text chats with limited file uploads plus web search. For keeping your sources in one place long term, Supabase’s free plan is the one-box route: Postgres with pgvector plus auth, storage and edge functions on two projects. Weaviate’s always-free cluster is the closest managed analog, with embeddings included.
- Can I build my own NotebookLM-style RAG for free?
- Yes, and no card is needed anywhere in the stack. Embeddings: Voyage AI grants 200 million free tokens per model (3 requests and 10K tokens a minute without a payment method) and Mixedbread starts you with $5 of one-time credits. Vector storage: Pinecone’s free plan holds 2 GB across 5 serverless indexes, Zilliz 5 GB, Qdrant a 1 GB cluster (about 1 million vectors at 768 dimensions), and Weaviate 100,000 objects with embeddings included.
- Do these NotebookLM alternatives need a credit card?
- No - none of the eight rows asks for a card. The catch sits elsewhere: Supabase pauses a free project after a week of inactivity, Qdrant suspends after a week and deletes after four weeks unused, and Pinecone’s free plan runs on AWS us-east-1 only.
- How current is this comparison?
- Every row is generated from the aifree.dev catalog, whose Verified offers are re-checked monthly. Vector database and embedding allowances shift quietly - collections shrink, inactivity deletions kick in - so a row changes or disappears when the vendor does.
Step-by-step guides
- Free Alternatives to ChatGPT Plus Features
- Free OpenAI API Access in 2026: What's Actually Free
- Free Embeddings and Reranking APIs in 2026
- Free Vector Databases for RAG in 2026
- Free AI APIs With No Credit Card in 2026
- Free AI for Teachers in 2026: Lesson Planning, Grading and Slides
- How to Run an AI Agent for $0 in 2026: Models, Search and Vector DB
- Free AI for Nonprofits in 2026: Google, Microsoft, Canva, OpenAI and Claude
- Free AI Writing Assistants in 2026: ChatGPT, Gemini, Claude, Notion AI, Grammarly and Copilot
- Free AI Chat Without Login in 2026: Duck.ai, ChatGPT, Gemini, Perplexity, Copilot and HuggingChat
- Free AI for Data Analysis in 2026: ChatGPT, Claude, Google Colab and Kaggle
- Free AI for Job Seekers in 2026: Resume, Cover Letter and Interview Practice
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