AI-ASSISTANTS
OpenRouter launches Batch API for half-price async inference while building out its decision model catalog.
Alternatives · AI assistants
Retell AI alternatives
The best Retell AI alternatives in AI assistants, ranked by Sparkpulse's velocity_score.
Updated Oct 29, 2026
Looking for the best alternatives to Retell AI? Sparkpulse tracks and ranks 12 alternatives in AI assistants by shipping velocity — how frequently each ships meaningful updates, verified from official changelogs. For reference, Retell AI shipped 0 meaningful updates in the last 30 days and carries a velocity score of 0.0 out of 10 in 2026. The alternatives below are ranked the same way, so you're comparing real release momentum, not marketing claims.
About 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.
Velocity 0.0 · Last update 4mo ago
Top 12 alternatives to Retell AI
Ranked by recent ship velocity. Tap any card for the full editorial breakdown, or pivot to a head-to-head.
AI-ASSISTANTS
Gemini enters enterprise cybersecurity with specialized models and a government defense program
AI-ASSISTANTS
Copilot adds GPT-6.1 Terra as a cheaper agentic default and makes assisted permissions GA.
AI-ASSISTANTS
Claude Duet opens a proactive-agent app to Pro and Max, the first move after the 5.5 rollout.
AI-ASSISTANTS
LobeHub canary.3 adds Projects with a lead agent, multi-file Canvas artifacts and Docs.
AI-ASSISTANTS
Dosu publishes a content series on agent memory architecture while the product feed shows no feature announcements.
AI-ASSISTANTS
Ollama v0.40.11 adds local speech output on macOS, with an OpenAI-compatible audio endpoint.
AI-ASSISTANTS
InvokeAI 7 alpha 3 turns boards into shared, role-gated spaces and adds Qwen-Image-2.1.
AI-ASSISTANTS
vLLM in a six-RC sprint to stabilize v0.29.0 with Mamba and hybrid prefix caching
AI-ASSISTANTS
opencode's feed goes quiet after V2 took over, with only CI and animation tags.
AI-ASSISTANTS
Baseten ends the free launch of elephant-1 and mammoth-1 and adds per-replica metrics.
AI-ASSISTANTS
DocsBot publishes an e-commerce case study while waiting for its November launch week.
Retell AI vs alternatives — shipping velocity at a glance
Velocity score (0–10) and meaningful releases shipped in the last 30 days, from official changelogs. Higher = shipping faster.
| Product | Velocity | Sparks · 30d | Focus areas | Latest release |
|---|---|---|---|---|
| Retell AI (baseline) | 0.0 | 0 | voice-aiconversation-flowsagent-composition | Flex Mode for Conversation Flows |
| OpenRouter | 10.0 | 0 | batch-inferencecost-optimizationdecision-models | Batch API launches: half-price inference for async workloads |
| Gemini | 10.0 | 0 | ai-modelscybersecurityagentic-ai | — |
| GitHub Copilot | 8.8 | 0 | agentic-codingmulti-modelenterprise-governance | — |
| Claude | 8.8 | 2 | agentsproactive-aimodel-family | Claude Duet research preview: a proactive agent app for Pro and Max |
| LobeChat | 7.5 | 0 | ai-assistantsmulti-agentprojects | — |
| Dosu | 7.5 | 0 | ai-agentsdeveloper-toolsagent-memory | — |
| Ollama | 6.3 | 1 | local-llmtext-to-speechopen-models | v0.40.11: speech output on macOS and d3 decision models |
| InvokeAI | 6.3 | 1 | local-aiimage-generationmulti-user | InvokeAI 7 alpha: autosaving projects and a single widget workbench |
| vLLM | 6.3 | 0 | llm-inferenceprefix-cachingmoe-models | — |
| opencode | 5.0 | 0 | ai-coding-agentcliopen-source | — |
| Baseten | 5.0 | 0 | ai-inferencemodel-apisobservability | — |
| DocsBot AI | 5.0 | 0 | ai-supportchatbotsknowledge-base | — |
The 12 best Retell AI alternatives, in depth
1. OpenRouter · velocity 10.0
OpenRouter launches Batch API for half-price async inference while building out its decision model catalog.
Its velocity score of 10.0/10 reflects longer-term release cadence; its most recent meaningful update was “Batch API launches: half-price inference for async workloads”.
Where Retell AI leans on voice ai, conversation flows and agent composition, OpenRouter focuses on batch inference, cost optimization and decision models.
OpenRouter and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full OpenRouter trajectory → · Compare Retell AI vs OpenRouter →
2. Gemini · velocity 10.0
Gemini enters enterprise cybersecurity with specialized models and a government defense program.
Its velocity score of 10.0/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, Gemini focuses on ai models, cybersecurity and agentic ai.
Gemini and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
3. GitHub Copilot · velocity 8.8
Copilot adds GPT-6.1 Terra as a cheaper agentic default and makes assisted permissions GA.
Its velocity score of 8.8/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, GitHub Copilot focuses on agentic coding, multi model and enterprise governance.
GitHub Copilot and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full GitHub Copilot trajectory → · Compare Retell AI vs GitHub Copilot →
4. Claude · velocity 8.8
Claude Duet opens a proactive-agent app to Pro and Max, the first move after the 5.5 rollout.
Over the last 30 days Claude shipped 2 meaningful updates vs Retell AI's 0, most recently “Claude Duet research preview: a proactive agent app for Pro and Max”. Its velocity score of 8.8/10 blends that with longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, Claude focuses on agents, proactive ai and model family.
Over the last 30 days Claude has been shipping faster than Retell AI — a point in its favour if release momentum matters to you.
5. LobeChat · velocity 7.5
LobeHub canary.3 adds Projects with a lead agent, multi-file Canvas artifacts and Docs.
Its velocity score of 7.5/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, LobeChat focuses on ai assistants, multi agent and projects.
LobeChat and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full LobeChat trajectory → · Compare Retell AI vs LobeChat →
6. Dosu · velocity 7.5
Dosu publishes a content series on agent memory architecture while the product feed shows no feature announcements.
Its velocity score of 7.5/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, Dosu focuses on ai agents, developer tools and agent memory.
Dosu and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
7. Ollama · velocity 6.3
Ollama v0.40.11 adds local speech output on macOS, with an OpenAI-compatible audio endpoint.
Over the last 30 days Ollama shipped 1 meaningful update vs Retell AI's 0, most recently “v0.40.11: speech output on macOS and d3 decision models”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, Ollama focuses on local llm, text to speech and open models.
Over the last 30 days Ollama has been shipping faster than Retell AI — a point in its favour if release momentum matters to you.
8. InvokeAI · velocity 6.3
InvokeAI 7 alpha 3 turns boards into shared, role-gated spaces and adds Qwen-Image-2.1.
Over the last 30 days InvokeAI shipped 1 meaningful update vs Retell AI's 0, most recently “InvokeAI 7 alpha: autosaving projects and a single widget workbench”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, InvokeAI focuses on local ai, image generation and multi user.
Over the last 30 days InvokeAI has been shipping faster than Retell AI — a point in its favour if release momentum matters to you.
Full InvokeAI trajectory → · Compare Retell AI vs InvokeAI →
9. vLLM · velocity 6.3
VLLM in a six-RC sprint to stabilize v0.29.0 with Mamba and hybrid prefix caching.
Its velocity score of 6.3/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, vLLM focuses on llm inference, prefix caching and moe models.
vLLM and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
10. opencode · velocity 5.0
Opencode's feed goes quiet after V2 took over, with only CI and animation tags.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, opencode focuses on ai coding agent, cli and open source.
opencode and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full opencode trajectory → · Compare Retell AI vs opencode →
11. Baseten · velocity 5.0
Baseten ends the free launch of elephant-1 and mammoth-1 and adds per-replica metrics.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, Baseten focuses on ai inference, model apis and observability.
Baseten and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
12. DocsBot AI · velocity 5.0
DocsBot publishes an e-commerce case study while waiting for its November launch week.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Retell AI leans on voice ai, conversation flows and agent composition, DocsBot AI focuses on ai support, chatbots and knowledge base.
DocsBot AI and Retell AI have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full DocsBot AI trajectory → · Compare Retell AI vs DocsBot AI →
Frequently asked questions
What are the best alternatives to Retell AI?
The top Retell AI alternatives we currently track in AI assistants are OpenRouter, Gemini, GitHub Copilot, Claude, LobeChat, ranked by recent ship velocity.
How is this list of Retell AI alternatives ranked?
Alternatives are ranked by Sparkpulse's velocity_score — release cadence + 30-day spark count + sector-relative ship rate.
Can I compare Retell AI directly with one of these alternatives?
Yes — every card has a "Compare with Retell AI" link to a side-by-side /compare page.