Carbon (Perplexity) vs LlamaIndex (2026)
Overview
Carbon, acquired by Perplexity in December 2024, provided pre-built data connectors for ingesting unstructured data from 25+ sources into LLM applications. Its managed API was wound down in March 2025, with its technology now integrated into Perplexity's enterprise data connectivity stack. Carbon's connectors supported Google Drive, Notion, Slack, Confluence, and other popular data sources for RAG pipelines.
LlamaIndex (formerly GPT Index) is a data framework for connecting LLMs with external data sources. It provides connectors for 160+ data sources, document parsers, indexing strategies, and query engines that make it easy to build RAG applications. LlamaIndex supports advanced retrieval patterns including recursive retrieval, knowledge graphs, and multi-document agents. The LlamaCloud managed service handles document ingestion and parsing at scale.
Key features
Core capabilities each platform advertises.
- Data connectors
- Google Drive
- Notion
- Slack integration
- Data framework for LLM applications
- 100+ data connectors
- Advanced chunking and indexing
- Query engines and agents
- Evaluation and observability
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Pre-built connectors for easy integration with multiple data sources
- AI-optimized data processing with automatic chunking, embedding, and cleaning
- Enterprise-grade security with SOC 2 Type II compliance and end-to-end encryption
- Streamlined RAG development with production-ready infrastructure
- Now backed by Perplexity AI with enhanced enterprise capabilities
Cons
- Company was acquired and original standalone service is winding down
- Pricing information not transparently available
- Limited documentation on migration paths after acquisition
- Uncertain future roadmap as integration with Perplexity progresses
Pros
- Comprehensive document support with 90+ file types including complex layouts and handwritten content
- Massive adoption with 25M+ monthly downloads and 300k+ users
- Generous free tier with 10,000 monthly credits covering ~1,000 pages
- Complete AI workflow toolkit with frameworks, parsing, and orchestration in one platform
- Strong enterprise adoption by major companies like Salesforce and Carlyle
Cons
- Credit-based system may require careful monitoring for high-volume users
- Pricing details for paid tiers not fully transparent on website
- Learning curve for utilizing all framework capabilities effectively
Carbon (Perplexity) or LlamaIndex — which should you choose?
Choose Carbon (Perplexity) if you wantChoose if you want
Choose LlamaIndex if you wantChoose if you want
- Building RAG pipelines from any data source
- Enterprise knowledge base creation
- Multi-source data integration for AI
- Structured data extraction and querying
- Agent-based data interaction
Compare Carbon (Perplexity) and LlamaIndex on your own traffic
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