AssemblyAI vs LlamaIndex

AssemblyAI

LlamaIndex

AssemblyAI · 11 features

• Advanced Prompting — Streaming with disfluency + code-switching + realtime diarization.
• Audio Intelligence — Sentiment, topic detection, summarization, entity detection, content safety, IAB…
• Auto Punctuation — Smart capitalization + punctuation.
• Keyterm Prompting — Boost accuracy for domain vocabulary.
• LeMUR (LLM framework) — Run LLMs over transcripts: Q&A, summary, action items.
• Medical Mode — Specialized for clinical + medical vocabulary.
• PII Redaction — Auto-redact credit cards, SSNs, addresses, emails.
• Pre-recorded Transcription — Upload audio/video URL or file → transcript.
• Realtime Streaming — WebSocket-based low-latency STT.
• Speaker Diarization — Identify who spoke when.
• Webhooks — Auto-notify when transcription finishes.

LlamaIndex · 16 features

• Agents — Agent patterns: ReAct, function-calling, multi-agent workflows.
• Document Readers — 200+ readers for PDF, web, Google Drive, SharePoint, Notion, S3, Slack.
• Evaluations — Built-in eval framework: faithfulness, context precision/recall.
• LlamaCloud — Managed indexing + retrieval platform. File connectors, auto-chunking, retrieval…
• LlamaExtract — Schema-based structured extraction from unstructured docs.
• LlamaHub — Community marketplace of readers, tools, prompts.
• LlamaParse — Best-in-class PDF + complex document parser. Tables, math, layout preserved.
• Multimodal — Image + text models, image retrieval.
• Node Parsers — Document chunkers: token, sentence, semantic, hierarchical.
• Observability (OpenLLMetry) — OTel-based tracing baked in.
• Property Graph — Graph-based RAG (knowledge graphs from unstructured data).
• Query Engines — Retrieval + response synthesis combos — router, sub-question, tree, etc.
• RAG — End-to-end RAG patterns: ingest → index → retrieve → synthesize.
• Tools — 50+ pre-built tool integrations.
• Vector Store Integrations — 50+ vector DB integrations.
• Workflows — Event-driven agent workflows (AgentWorkflow).