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Comparison · ai-assistants
Dify vs Retell AI
A side-by-side editorial comparison of Dify and Retell AI — release velocity, themes, recent moves, and the top alternatives to consider.
Dify vs Retell AI: at a glance
What is Dify?
Dify 1.19 traces workflows layer by layer, down to the LLM calls inside nested tools.
Dify 1.19.0 sends nested workflow traces to external observability tools: steps inside called Workflow Tools now appear beneath the span that invoked them, with prompts, responses and token usage attached. It also makes Workflow Tools portable inside App packages, adds Skill Hub automation and easier Agent file uploads. It follows 1.18.0, which let an Agent node pick the next workflow branch and introduced the .ifpkg package and difyctl CLI.
What is Retell AI?
Voice-AI platform building toward composable, flexibly-routed agents
Retell builds voice AI agents, and the captured releases (through early 2026) center on making complex agents maintainable and adaptive: Agent Transfer for handing context between modular agents, Flex Mode for non-linear flow navigation, reusable Flow Components, and node-level knowledge bases. Add to that a chat widget, an AI QA Analyst, and periodic pricing adjustments.
Dify vs Retell AI: editorial side-by-side
Dify
6.3AI-ASSISTANTS
Dify 1.19 traces workflows layer by layer, down to the LLM calls inside nested tools.
◆ Current state
Dify 1.19.0 sends nested workflow traces to external observability tools: steps inside called Workflow Tools now appear beneath the span that invoked them, with prompts, responses and token usage attached. It also makes Workflow Tools portable inside App packages, adds Skill Hub automation and easier Agent file uploads. It follows 1.18.0, which let an Agent node pick the next workflow branch and introduced the .ifpkg package and difyctl CLI.
◆ Where it's heading
After several releases that made agents act inside workflows, Dify is now making that behaviour inspectable and portable. Tracing nested calls and packaging tools with apps are what teams need before trusting agent-routed workflows in production.
◆ Prediction
Expect more observability and evaluation work around agent decisions, such as tracing why an Agent chose a route. Packaging will likely extend to more component types as .ifpkg becomes the deployment unit.
Retell AI
0.0AI-ASSISTANTS
Voice-AI platform building toward composable, flexibly-routed agents
◆ Current state
Retell builds voice AI agents, and the captured releases (through early 2026) center on making complex agents maintainable and adaptive: Agent Transfer for handing context between modular agents, Flex Mode for non-linear flow navigation, reusable Flow Components, and node-level knowledge bases. Add to that a chat widget, an AI QA Analyst, and periodic pricing adjustments.
◆ Where it's heading
The arc is from rigid, single-purpose call flows toward modular, composable agent systems — reusable sub-agents and components, knowledge scoped per node, and flows that follow the caller rather than forcing a script. It's an enterprise-maintainability story layered on top of the core voice capability.
◆ Prediction
Expect continued investment in flow flexibility and agent composition, plus QA/observability tooling. Note the captured changelog runs only through January 2026, so recent cadence is unclear from this data.
Alternatives to Dify and Retell AI
Other ai-assistants products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Dify or Retell AI.
Docling
Docling adds Surya 2.5 and calendar files while patching format edge cases daily.
InvokeAI
InvokeAI 7 reaches beta with projects and a single widget workbench as the new default.
Claude
Claude Enterprise lets finance teams tag project spend by cost code.
LobeChat
LobeHub v2.3.2 adds task labels, MCP Apps in chat and Copilot CLI as an agent.
DocsBot AI
DocsBot closes its launch week with Evals, a way to test bot changes before customers see them.
See all Dify alternatives → · See all Retell AI alternatives →
Recent activity from Dify and Retell AI
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoDifyv1.19.0 - Trace Your Workflows, Layer by Layer
- 17d agoDifyv1.18.0 — Smarter Agent Routing, Portable Apps, Deeper Workflow Visibility ⚡
- 2mo agoDifyv1.17.1 - Bug Fixes and Improvements
- 3mo agoDifyRelease v1.16.1 - Bug Fixes and Security Enhancements
- 4mo agoDifyDify Agent: sandboxed Linux runtime ships in experimental ⚡
- 5mo agoDifyv1.14.2 - Security fixes, agent groundwork, workflow reliability, and deployment updates
- 9mo agoRetell AIAI QA Analyst
- 10mo agoRetell AIFlex Mode for Conversation Flows ⚡
- 11mo agoRetell AIConversation Flow Components are Live! - Reusable flows & functions across agents.
- 1y agoRetell AINode KB — Smarter Knowledge Access at the Node Level
- 1y agoRetell AITelnyx Pricing Adjustment
- 1y agoRetell AIAgent Transfer ⚡
Frequently asked questions
What is the difference between Dify and Retell AI?
They serve adjacent needs but don't currently overlap on shipped themes. Dify is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Dify better than Retell AI?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Dify is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other ai-assistants products to evaluate alongside.
What are the best alternatives to Dify?
Top Dify alternatives in ai-assistants are ranked by recent ship velocity. Browse the "Dify alternatives" section above for the current picks, or visit /alternatives/dify for the full list with editorial commentary on each.
What are the best alternatives to Retell AI?
Top Retell AI alternatives in ai-assistants are ranked by recent ship velocity. Browse the "Retell AI alternatives" section above for the current picks, or visit /alternatives/retell for the full list with editorial commentary on each.