LlamaIndex alternatives

Neural search engine for finding and ranking web pages by meaning.

freemiumfree $10 credits/mo; usage-based PayGO; Enterprise custom

Search API optimized for LLM agents with structured, sourced answers.

freemiumfree tier (1k calls/mo); paid from $30/mo

Answer engine with citations — search rebuilt around LLMs.

freemiumfree tier; Pro $20/mo, Max $200/mo

Turn entire websites into clean, LLM-ready markdown or structured data.

freemiumopen source self-host free; cloud 1,000 credits/mo free, then Hobby/Standard/Growth paid

Google's research notebook — grounded Q&A and audio overviews over your own sources.

freemiumfree; Plus via Google AI Plus $4.99/mo; Pro via Google AI Pro $19.99/mo

Rust-built open-source vector DB — fast, lean and easy to self-host.

freemiumself-host free; managed cloud free tier, paid usage-based

Open-source vector database with hybrid search and modular ML integrations.

freemiumself-host free; cloud free tier, Flex from $45/mo

Real-time SERP API returning structured JSON from Google, Bing, Yandex, and DuckDuckGo.

freemium500 free API responses on signup; then $0.25 per 1,000 responses pay-as-you-go

Scientific search engine that answers questions with evidence from papers.

freemiumfree tier; Pro $20/mo ($144/yr), Deep $65/mo ($540/yr)

Chat-based AI workspace for analyzing data, building reports, presentations, and simple web apps.

freemiumFree $0/mo; Plus $20/mo ($16/mo billed yearly); Pro $45/mo ($37/mo yearly); Max $200/mo ($166/mo yearly); Business $450/mo ($375/mo yearly); all paid tiers are credit-based

Serverless browser infrastructure for AI agents and scrapers.

freemiumFree; Developer $20/mo; Startup $99/mo; Scale custom

Open-source search infrastructure for AI — local library plus usage-priced Cloud.

freemiumOSS self-host free; Cloud Starter $0 + usage ($5 credits); Team $250/mo + usage ($100 credits, no rollover); write $2.50/GiB, storage $0.33/GiB-mo

AI research assistant that extracts structured data from academic papers.

freemiumfree tier; Plus $11/mo, Pro $39/mo (billed yearly)

LlamaIndex hosted document parser — credits per page, not an OSS engine.

freemium10K credits/mo on Free (hard stop); 1,000 credits = $1.25 (NA/EU); v2 Fast 1 / Cost-effective 3 / Agentic 10 / Agentic Plus 45 credits/page; Starter 40K incl. (PAYG to $500/mo); Pro 400K (PAYG to $5,000/mo); seat $ not in this HTML extract

Web research APIs for agents — priced per request, not per token, with a free monthly cap.

freemiumup to 5,000 requests/mo free; Search from $0.001–$0.005/10 results; Task API $0.005–$2.40/request; Extract $0.001/request

Managed vector database — the serverless default for embeddings at scale.

freemiumfree Starter; Builder $20/mo; Standard pay-as-you-go (min $50/mo)

Open-source cloud browsers for agents — sessions API, CAPTCHA, proxies, or Docker self-host.

freemiumLaunch $0 + usage ($30 one-time credits, $0.10/browser-hour); Scale $250/mo + usage ($0.08/h, $100 credits/mo); proxy $6–$10/GB

Embedding and rerank APIs — large free-token grants, then cheap per-million rates.

freemiumvoyage-4 $0.06/1M after 200M free tokens; voyage-4-lite $0.02/1M; rerank-2.5 $0.05/1M after 200M free; Batch API 33% off, no free-token apply

Embedding service that turns text and images into vectors for semantic retrieval and agentic applications.

paid

Python framework that compiles declarative LLM programs with optimizers instead of hand-written prompts.

free

AI-native multimodal lakehouse unifying data curation, retrieval, and training.

freemium

AI-native product discovery platform that trains dedicated models on catalogs and shopper behavior.

paid

Open-source vector database for high-dimensional similarity search on massive datasets.

freemiumMilvus Lite is free for local prototyping; Zilliz Cloud offers paid serverless and dedicated cluster tiers.

Open-source vector similarity search extension for Postgres.

free

Open-source RAG engine that ingests multi-format data and combines hybrid search with agent orchestration.

freemiumFree tier: 5 apps, 1 team member, 0.1 GB storage, 500 credits/month; paid tiers from $29/month.

Enterprise platform that turns complex unstructured files into clean, AI-ready structured data.

freemium

Serverless vector database with dense, sparse, and hybrid indexes via REST API or SDKs.

freemiumFree plan includes 10,000 queries and 10,000 updates daily; paid tiers include Pay-as-you-go, Fixed, Pro, and Enterprise.