As of August 3, 2026, 11 named companies are verified to use Alta and 120 to use Twilio. 1 companies are verified to use both, including Atlassian. Every company below is backed by a public source.
Notable: Snowflake, Deel, monday.com, Mesh Payments, Riverside.
View the full Alta list →Notable: Netflix, Lyft, Shopify, Airbnb, Dell, Walmart, Instacart, Uber.
View the full Twilio list →1 verified on both lists.
Based on publicly-sourced evidence, CompetitorIQ has verified 11 named companies using Alta and 120 using Twilio as of August 3, 2026. Each figure counts only companies with a linked public source, so both are conservative floors, not the vendors' full customer counts.
1 companies are verified to use both, including Atlassian. Each appears on both verified customer lists with its own public source.
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