AssemblyAI vs Najva

Najva is a free macOS menubar app focused on offline speech-to-text with AI context processing. It uses local speech recognition (privacy-first) and can send text to customizable AI models for summarization or expansion, with context injection from clipboard or selected text. AssemblyAI is a full-stack developer platform offering pre-recorded and real-time streaming APIs (Universal-3.5 Pro and Universal-2), a Voice Agent API with built-in turn detection and interruption handling, plus Speech Understanding APIs (speaker ID, sentiment, chapters, summaries). AssemblyAI's Sync API returns transcripts in a single call (~134 ms latency), ideal for dictation. Najva has no real-time streaming, no API, and no cloud features. AssemblyAI supports 99 languages via Universal-2, while Najva supports multiple languages offline but counts are unspecified. AssemblyAI integrates with Pipecat, ElevenLabs, Zoom, and LLMs (GPT, Claude, Gemini) via its LLM Gateway; Najva does not list integrations. Both offer AI text processing, but AssemblyAI's is broader (guardrails PII redaction, content moderation, keyterms prompting).

Najva is completely free — no tiers, no subscriptions, no pay-per-use. AssemblyAI follows a freemium model: first 100 minutes free per month (no credit card required), then pay-as-you-go at $0.15/hr for Universal-2 (99 languages) or $0.21/hr for Universal-3.5 Pro (18 languages). There are no monthly plans or unlimited tiers; pricing is usage-based. For heavy transcription workloads, AssemblyAI can become expensive, but it's cost-effective for low-volume or sporadic use. Najva's zero cost is attractive for budget-constrained solo users, but it lacks cloud sync and multi-device access. AssemblyAI's free tier is limited (100 min), suitable for prototyping. There are no enterprise or volume discounts listed in the data. If you need offline privacy, Najva's free model wins; if you need scale or real-time, AssemblyAI's per-hour pricing is standard.