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Onyx vs Synthflow

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Onyx compared with Synthflow
DetailOnyxSynthflow
What it doesOpen source enterprise search and AI assistant platform AI Voice Agent Platform to Automate Your Phone Calls
StageGrowing Growing
FoundedNot given 2023
Based inNot given DE
Pricing modelfreemium freemium
PricingFree open-source self-hosting available. Managed cloud Business plan: $20/user/month (annual) or $25/user/month (monthly). Enterprise plan with custom pricing, on-premise deployments, OIDC/SAML SSO, white-labeling, and dedicated support. Free tier for building agents; Pay-As-You-Go model for calls; Enterprise contracts starting at $30,000 annually
Key features
  • Chat and search UI
  • Access to all major LLMs
  • Custom AI agents
  • MCP and OpenAPI actions
  • 40+ app connectors
  • Web search and deep research
  • Code interpreter
  • Slack integration
  • Developer APIs
  • Permission-aware connectors
  • Multi-Agent System with modular voice flows
  • In-house telephony with sub-100ms latency
  • Native CRM and ERP integrations
  • Support for 50+ languages and regional accents
  • HIPAA, SOC 2, and PCI DSS Compliance
What makes it different
  • Searches all sources in parallel for faster answers
  • Self-hosted with data never leaving customer infrastructure
  • Permission-aware from day one with real-time sync
  • Supports any LLM provider with one-click switching
  • State-of-the-art search outperforming industry leaders
  • Own enterprise-grade telephony infrastructure with no vendor lock-in
  • Proven BELL deployment framework reducing time to ROI
  • 99.99% uptime with multi-cloud redundancy and instant failover
  • Enterprise security certified across SOC 2, HIPAA, PCI DSS, and GDPR
  • Direct integrations with enterprise systems without vendor lock-in
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)62 no change since last check73 no change since last check
Trust Flow (Majestic)2937
Citation Flow (Majestic)5049
Referring domains (Majestic)16864696

6 details filled in for both companies.

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