Retell is ahead on repeatable reliability, task completion, tool call accuracy and interruption handling, and ElevenLabs on infrastructure reliability, voice tone and clarity and response time.
Last updated Methodology by Luis Ojeda
Pick ElevenLabs for calls that connect and stay up (1.63 points higher), how the agent sounds (0.11 higher) and fast replies (0.93s faster). Pick Retell for reliability across repeated runs (6.10 points higher), completing the caller's task (2.42 points higher), accurate tool calls (0.41 higher) and handling interruptions (0.04 higher).
Bars share one scale across all 8 platforms. The place next to each figure is its rank in the field.
Share of the 82 scenarios that passed on all three runs.
Retell, 6.10 points higher
Calls where the expected outcome was fully reached.
Retell, 2.42 points higher
Calls with no connection, audio or platform failure.
ElevenLabs, 1.63 points higher
Mean score for calling the right tool with the right arguments.
Retell, 0.41 higher
Mean score for how clear and natural the agent sounds.
ElevenLabs, 0.11 higher
Mean score for yielding and recovering when the caller cuts in.
Retell, 0.04 higher
Mean time for the agent to start replying after the caller stops.
ElevenLabs, 0.93s faster
246 calls per platform: 82 scenarios, 3 runs each.
Retell is more reliable, by 6.10 points. ElevenLabs passed 69.51% of the 82 scenarios on all 3 runs and Retell passed 75.61%. A scenario only counts when every run of it passed.
ElevenLabs starts replying sooner, 0.93s faster. Mean response time is 1.27s for ElevenLabs and 2.21s for Retell.
ElevenLabs reached the expected outcome on 91.46% of calls and Retell on 93.88%. Retell is ahead on task completion.
Both ran the same Appointment and Medicare agents through the same 82 caller scenarios, 3 times each, with the same evaluators and mock tools. Only the platform and its speech and model components changed.
