---
title: "Retell AI vs Synthflow: Which is more popular by branded search?"
description: "Which is more popular in search, Retell AI or Synthflow? Compare estimated monthly branded-search demand and Share of Search inside the AI voice agents set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time."
canonical: "https://gobrandwave.com/demand/global-en/compare/retell-ai-vs-synthflow"
publisher: "Brandwave"
---

# Retell AI vs Synthflow: Which is more popular by branded search?

Which is more popular in search, Retell AI or Synthflow? Compare estimated monthly branded-search demand and Share of Search inside the AI voice agents set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.

## Key facts

- **Compared**: Retell AI and Synthflow
- **Competitive set**: AI voice agents
- **Market**: Global
- **Month measured**: Aug 2026
- **Retell AI Share of Search**: 65.1%
- **Synthflow Share of Search**: 4.7%

## Which is more popular in search, Retell AI or Synthflow?

- In August 2026, Retell AI had more branded searches than Synthflow among AI voice agents worldwide. Retell AI was estimated to have 74K branded searches compared to Synthflow’s 5.4K, and held a 65.1% Share of Search versus Synthflow’s 4.7%.
- Retell AI was ahead of Synthflow in every measured month of the 11 months ending August 2026.
- Across the 11 months ending August 2026, Retell AI’s estimated Share of Search among AI voice agents worldwide moved from 54.1% to 65.1%, and its estimated monthly branded searches moved from 60.5K to 74K.
- Across the 11 months ending August 2026, Synthflow’s estimated Share of Search among AI voice agents worldwide moved from 10.8% to 4.7%, and its estimated monthly branded searches moved from 12.1K to 5.4K.

## How did search popularity change for AI voice agents worldwide in August 2026?

- In August 2026, Retell AI gained estimated Share of Search among AI voice agents worldwide, from 55.5% to 65.1%.
- In August 2026, Synthflow lost estimated Share of Search among AI voice agents worldwide, from 6.1% to 4.7%.

## Month by month

| Month | Retell AI estimated searches | Retell AI Share of Search | Retell AI rank | Synthflow estimated searches | Synthflow Share of Search | Synthflow rank |
| --- | --- | --- | --- | --- | --- | --- |
| Oct 2025 | 60.5K | 54.1% | 1 | 12.1K | 10.8% | 4 |
| Nov 2025 | 60.5K | 55.2% | 1 | 9.9K | 9% | 4 |
| Dec 2025 | 60.5K | 60.1% | 1 | 8.1K | 8% | 4 |
| Jan 2026 | 74K | 58.8% | 1 | 9.9K | 7.9% | 4 |
| Feb 2026 | 74K | 58.1% | 1 | 8.1K | 6.4% | 4 |
| Mar 2026 | 74K | 54.8% | 1 | 9.9K | 7.3% | 4 |
| Apr 2026 | 74K | 56.9% | 1 | 8.1K | 6.2% | 4 |
| May 2026 | 74K | 53.9% | 1 | 8.1K | 5.9% | 4 |
| Jun 2026 | 60.5K | 55.5% | 1 | 6.6K | 6.1% | 4 |
| Jul 2026 | 60.5K | 55.5% | 1 | 6.6K | 6.1% | 4 |
| Aug 2026 | 74K | 65.1% | 1 | 5.4K | 4.7% | 4 |
| Sep 2026 | — | — | — | — | — | — |

## How each brand is measured

Brandwave collects information about searches that people make online using Retell AI’s and Synthflow’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

- **Retell AI**: Measured on the search term “retell ai”.
- **Synthflow**: Measured on the search term “synthflow”.

- [Retell AI profile](/demand/global-en/brands/retell-ai)
- [Synthflow profile](/demand/global-en/brands/synthflow)
- [All AI voice agents worldwide](/demand/global-en/categories/ai-voice-agents): The set both shares are measured inside, 4 brands.

## Methodology

- [How is branded search demand measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused.

## Frequently asked questions

### Which is more popular in search, Retell AI or Synthflow?

In August 2026, Retell AI had more branded searches than Synthflow among AI voice agents worldwide. Retell AI was estimated to have 74K branded searches compared to Synthflow’s 5.4K, and held a 65.1% Share of Search versus Synthflow’s 4.7%.

## Cite this page

Brandwave. "Retell AI vs Synthflow: Which is more popular by branded search?". https://gobrandwave.com/demand/global-en/compare/retell-ai-vs-synthflow

This page is also available as HTML at https://gobrandwave.com/demand/global-en/compare/retell-ai-vs-synthflow. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.