--- title: "AI voice agents: Which brands are most popular in search?" description: "Compare the platforms used to build AI voice agents. Share of Search among Retell AI, Vapi, Bland AI and Synthflow, the AI voice agents Brandwave compares worldwide, using the same methodology, market, and reporting period. 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/categories/ai-voice-agents" publisher: "Brandwave" --- # AI voice agents: Which brands are most popular in search? Compare the platforms used to build AI voice agents. Share of Search among Retell AI, Vapi, Bland AI and Synthflow, the AI voice agents Brandwave compares worldwide, using the same methodology, market, and reporting period. 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 - **Competitive set**: AI voice agents - **Market**: Global - **Brands compared**: 4 - **Month measured**: Aug 2026 - **Highest Share of Search**: Retell AI, 65.1% ## Which brand is most popular in search among AI voice agents worldwide? - In August 2026, Retell AI was the most searched among AI voice agents worldwide, with an estimated 74K branded searches and 65.1% estimated Share of Search within this set. - Vapi is in 2nd place, 45.6 percentage points behind at 19.5% Share of Search. - Across the 11 months ending August 2026, Retell AI’s estimated Share of Search among AI voice agents worldwide increased from 54.1% to 65.1%. - Across the 11 months ending August 2026, Vapi’s estimated Share of Search among AI voice agents worldwide decreased from 24.2% to 19.5%. - Across the 11 months ending August 2026, Synthflow’s estimated Share of Search among AI voice agents worldwide decreased from 10.8% to 4.7%. - Across the 11 months ending August 2026, Retell AI’s estimated Share of Search among AI voice agents worldwide peaked at 65.1% in August 2026 and was lowest at 53.9% in May 2026. - Across the 11 months ending August 2026, Vapi’s estimated Share of Search among AI voice agents worldwide peaked at 29.5% in May 2026 and was lowest at 19.5% in August 2026. - Across the 11 months ending August 2026, Bland AI’s estimated Share of Search among AI voice agents worldwide peaked at 14.2% in February 2026 and was lowest at 9.8% in December 2025. - Across the 11 months ending August 2026, Bland AI held steady: its estimated Share of Search among AI voice agents worldwide moved less than 0.5 percentage points. ## Compare search popularity between leading brands - [Retell AI vs Vapi: compare search popularity](/demand/global-en/compare/retell-ai-vs-vapi): 65.1% against 19.5% Share of Search. - [Retell AI vs Bland AI: compare search popularity](/demand/global-en/compare/bland-ai-vs-retell-ai): 65.1% against 10.6% Share of Search. - [Retell AI vs Synthflow: compare search popularity](/demand/global-en/compare/retell-ai-vs-synthflow): 65.1% against 4.7% Share of Search. - [Vapi vs Bland AI: compare search popularity](/demand/global-en/compare/bland-ai-vs-vapi): 19.5% against 10.6% Share of Search. - [Vapi vs Synthflow: compare search popularity](/demand/global-en/compare/synthflow-vs-vapi): 19.5% against 4.7% Share of Search. - [Bland AI vs Synthflow: compare search popularity](/demand/global-en/compare/bland-ai-vs-synthflow): 10.6% against 4.7% Share of Search. ## 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, Vapi lost estimated Share of Search among AI voice agents worldwide, from 24.9% to 19.5%. - In August 2026, Bland AI lost estimated Share of Search among AI voice agents worldwide, from 13.6% to 10.6%. - In August 2026, Synthflow lost estimated Share of Search among AI voice agents worldwide, from 6.1% to 4.7%. ## Share of Search ranking | Rank | Brand | Share of Search | Estimated monthly branded searches | Change vs prior month | Owned by | | --- | --- | --- | --- | --- | --- | | 1 | Retell AI | 65.1% | 74K | +22.3% | Retell AI | | 2 | Vapi | 19.5% | 22.2K | -18.1% | Vapi | | 3 | Bland AI | 10.6% | 12.1K | -18.2% | Bland AI | | 4 | Synthflow | 4.7% | 5.4K | -18.2% | Synthflow | ## Historical estimated branded-search demand | Month | Brand | Estimated monthly branded searches | Share of Search | Rank | | --- | --- | --- | --- | --- | | Oct 2025 | Retell AI | 60.5K | 54.1% | 1 | | Oct 2025 | Vapi | 27.1K | 24.2% | 2 | | Oct 2025 | Bland AI | 12.1K | 10.8% | 3 | | Oct 2025 | Synthflow | 12.1K | 10.8% | 4 | | Nov 2025 | Retell AI | 60.5K | 55.2% | 1 | | Nov 2025 | Vapi | 27.1K | 24.7% | 2 | | Nov 2025 | Bland AI | 12.1K | 11% | 3 | | Nov 2025 | Synthflow | 9.9K | 9% | 4 | | Dec 2025 | Retell AI | 60.5K | 60.1% | 1 | | Dec 2025 | Vapi | 22.2K | 22% | 2 | | Dec 2025 | Bland AI | 9.9K | 9.8% | 3 | | Dec 2025 | Synthflow | 8.1K | 8% | 4 | | Jan 2026 | Retell AI | 74K | 58.8% | 1 | | Jan 2026 | Vapi | 27.1K | 21.5% | 2 | | Jan 2026 | Bland AI | 14.8K | 11.8% | 3 | | Jan 2026 | Synthflow | 9.9K | 7.9% | 4 | | Feb 2026 | Retell AI | 74K | 58.1% | 1 | | Feb 2026 | Vapi | 27.1K | 21.3% | 2 | | Feb 2026 | Bland AI | 18.1K | 14.2% | 3 | | Feb 2026 | Synthflow | 8.1K | 6.4% | 4 | | Mar 2026 | Retell AI | 74K | 54.8% | 1 | | Mar 2026 | Vapi | 33.1K | 24.5% | 2 | | Mar 2026 | Bland AI | 18.1K | 13.4% | 3 | | Mar 2026 | Synthflow | 9.9K | 7.3% | 4 | | Apr 2026 | Retell AI | 74K | 56.9% | 1 | | Apr 2026 | Vapi | 33.1K | 25.5% | 2 | | Apr 2026 | Bland AI | 14.8K | 11.4% | 3 | | Apr 2026 | Synthflow | 8.1K | 6.2% | 4 | | May 2026 | Retell AI | 74K | 53.9% | 1 | | May 2026 | Vapi | 40.5K | 29.5% | 2 | | May 2026 | Bland AI | 14.8K | 10.8% | 3 | | May 2026 | Synthflow | 8.1K | 5.9% | 4 | | Jun 2026 | Retell AI | 60.5K | 55.5% | 1 | | Jun 2026 | Vapi | 27.1K | 24.9% | 2 | | Jun 2026 | Bland AI | 14.8K | 13.6% | 3 | | Jun 2026 | Synthflow | 6.6K | 6.1% | 4 | | Jul 2026 | Retell AI | 60.5K | 55.5% | 1 | | Jul 2026 | Vapi | 27.1K | 24.9% | 2 | | Jul 2026 | Bland AI | 14.8K | 13.6% | 3 | | Jul 2026 | Synthflow | 6.6K | 6.1% | 4 | | Aug 2026 | Retell AI | 74K | 65.1% | 1 | | Aug 2026 | Vapi | 22.2K | 19.5% | 2 | | Aug 2026 | Bland AI | 12.1K | 10.6% | 3 | | Aug 2026 | Synthflow | 5.4K | 4.7% | 4 | | Sep 2026 | Bland AI | — | — | — | | Sep 2026 | Retell AI | — | — | — | | Sep 2026 | Synthflow | — | — | — | | Sep 2026 | Vapi | — | — | — | ## What is being compared - **Bland AI**: Measured on the search term “bland ai”. - **Retell AI**: Measured on the search term “retell ai”. - **Synthflow**: Measured on the search term “synthflow”. - **Vapi**: Measured on the search term “vapi ai”. - [Bland AI](/demand/global-en/brands/bland-ai) - [Retell AI](/demand/global-en/brands/retell-ai) - [Synthflow](/demand/global-en/brands/synthflow) - [Vapi](/demand/global-en/brands/vapi) ## 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 brand is most popular in search among AI voice agents worldwide? In August 2026, Retell AI was the most searched among AI voice agents worldwide, with an estimated 74K branded searches and 65.1% estimated Share of Search within this set. These are worldwide searches for English-language branded terms. ## Cite this page Brandwave. "AI voice agents: Which brands are most popular in search?". https://gobrandwave.com/demand/global-en/categories/ai-voice-agents This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/ai-voice-agents. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.