Customer Service Agents — Timeline
41 milestones, source-traced.
Oct 1, 2024
Funding: Sierra raised $175M Series B at a $4.5B valuation.
funding-research →Oct 1, 2024
Funding: Sierra raised a $175M Series B at a $4.5B valuation, led by Greenoaks Capital.
funding-research →Oct 9, 2024
Funding: Decagon raised a $65M Series B led by Bain Capital Ventures, with participation from…
Decagon raised a $65M Series B led by Bain Capital Ventures, with participation from Elad Gil, A*, Accel, BOND Capital, and ACME Capital.
funding-research →Nov 19, 2024
Funding: Cresta closed a $125 million Series D on November 19, 2024 at a post-money…
Cresta closed a $125 million Series D on November 19, 2024 at a post-money valuation of approximately $747 million, co-led by World Innovation Lab and Qatar Investment Authority with participation from Accenture, EnvisionX Capital, LG Technology Ventures, Qualcomm Ventures, Workday Ventures, Andreessen Horowitz, Greylock Partners, J.P. Morgan, Sequoia Capital, and Tiger Global, bringing total funding to over $270 million.
funding-research →Nov 19, 2024
Funding: Cresta closed a $125 million Series D round co-led by World Innovation Lab and…
Cresta closed a $125 million Series D round co-led by World Innovation Lab and Qatar Investment Authority at a post-money valuation of $746.97 million, bringing total funding to over $270 million.
funding-research →Mar 1, 2025
Funding: Ada received a CA$1.75M non-dilutive grant from FedDev Ontario for AI development.
funding-research →May 6, 2025
Funding: Parloa raised $120M Series C on May 6, 2025, led by Durable Capital Partners,…
Parloa raised $120M Series C on May 6, 2025, led by Durable Capital Partners, Altimeter Capital, and General Catalyst at a $1B valuation.
funding-research →May 6, 2025
Funding: Parloa raised a $120M Series C round led by Durable Capital Partners, Altimeter Capital,…
Parloa raised a $120M Series C round led by Durable Capital Partners, Altimeter Capital, and General Catalyst at a $1 billion valuation, with participation from EQT Ventures, RPT Capital, Senovo, and Mosaic Ventures.
funding-research →Jun 1, 2025
Product Launch: PolyAI launched early-access self-serve Agent Studio Lite.
funding-research →Jun 1, 2025
Customer Win: Decagon added over 100 new global enterprise customers in 2025, including Avis Budget Group,…
Decagon added over 100 new global enterprise customers in 2025, including Avis Budget Group, Block, and Deutsche Telekom.
funding-research →Jun 23, 2025
Funding: Decagon raised a $131M Series C led by Andreessen Horowitz and Accel, with participation…
Decagon raised a $131M Series C led by Andreessen Horowitz and Accel, with participation from Bain Capital Ventures, BOND Capital, Ribbit Capital, and Forerunner.
funding-research →Jun 23, 2025
Funding: Decagon raised a $131M Series C led by Andreessen Horowitz and Accel at a…
Decagon raised a $131M Series C led by Andreessen Horowitz and Accel at a $1.5B valuation.
funding-research →Sep 1, 2025
Funding: Sierra raised $350M Series C at a $10B valuation.
funding-research →Sep 1, 2025
Funding: Sierra raised a $350M Series C at a $10B valuation, led by Greenoaks Capital.
funding-research →Dec 15, 2025
Funding: PolyAI raised $86 million in Series D co-led by Georgian, Hedosophia, and Khosla Ventures…
PolyAI raised $86 million in Series D co-led by Georgian, Hedosophia, and Khosla Ventures with participation from NVentures (NVIDIA), British Business Bank, and Citi Ventures, at a $750 million valuation, bringing total funding to over $200 million.
funding-research →Dec 15, 2025
Funding: PolyAI raised an $86 million Series D co-led by Georgian, Hedosophia, and Khosla Ventures…
PolyAI raised an $86 million Series D co-led by Georgian, Hedosophia, and Khosla Ventures (with NVentures participating), at a $750 million valuation.
funding-research →Jan 15, 2026
Funding: Parloa raised $350M Series D on January 15, 2026, led by General Catalyst with…
Parloa raised $350M Series D on January 15, 2026, led by General Catalyst with participation from EQT Ventures, Altimeter Capital, Durable Capital Partners, and Mosaic Ventures at a $3B valuation.
funding-research →Jan 15, 2026
Funding: Parloa closed a $350M Series D round led by General Catalyst at a $3…
Parloa closed a $350M Series D round led by General Catalyst at a $3 billion valuation, with participation from EQT Ventures, Altimeter Capital, Durable Capital Partners, and Mosaic Ventures.
funding-research →Jan 28, 2026
Decagon, an AI customer-support agent company, was valued at ~$4.5B in a January 2026…
Decagon, an AI customer-support agent company, was valued at ~$4.5B in a January 2026 tender / Series D led by Coatue and Index.
Knowledge base →Jan 28, 2026
Funding: Decagon raised a $250M Series D led by Coatue Management and Index Ventures at…
Decagon raised a $250M Series D led by Coatue Management and Index Ventures at a $4.5B valuation, with participation from ChemistryVC, Definition Capital, Starwood Capital Group, a16z, Accel, Bain Capital Ventures, and Elad Gil.
funding-research →Mar 1, 2026
Company Fact: Decagon conducted its first employee tender offer at a $4.5B valuation, enabling 300+ employees…
Decagon conducted its first employee tender offer at a $4.5B valuation, enabling 300+ employees to sell vested shares.
funding-research →Apr 1, 2026
Parloa provides conversational AI for enterprise contact centers and is among the best-funded European…
Parloa provides conversational AI for enterprise contact centers and is among the best-funded European customer-service-AI vendors.
Knowledge base →Apr 1, 2026
Customer Win: HealthEquity, SAP, and BarmeniaGothaer were reported deploying Parloa's AI Agent platform at scale in…
HealthEquity, SAP, and BarmeniaGothaer were reported deploying Parloa's AI Agent platform at scale in April 2026.
funding-research →Apr 11, 2026
Customer Win: SAP and BarmeniaGothaer deployed Parloa's platform at scale.
funding-research →Apr 11, 2026
Customer Win: HealthEquity deployed Parloa's platform at scale.
funding-research →May 1, 2026
Sierra reached ~$150M ARR within eight quarters of launch — one of the fastest…
Sierra reached ~$150M ARR within eight quarters of launch — one of the fastest enterprise-agent ramps on record.
Knowledge base →May 1, 2026
Funding: Sierra closed a $950M Series E at a $15.8B post-money valuation, led by Tiger…
Sierra closed a $950M Series E at a $15.8B post-money valuation, led by Tiger Global and GV with participation from Benchmark, Sequoia, and Greenoaks.
funding-research →May 1, 2026
Acquisition: Sierra acquired Tokyo-based enterprise AI startup Opera Tech to enhance native service for Japanese…
Sierra acquired Tokyo-based enterprise AI startup Opera Tech to enhance native service for Japanese enterprises.
funding-research →May 1, 2026
Acquisition: Sierra acquired Paris-based AI operations startup Fragment to expand agent-development capacity in France.
funding-research →May 4, 2026
Sierra, the customer-experience AI agent company co-founded by Bret Taylor, reached a ~$15.8B valuation…
Sierra, the customer-experience AI agent company co-founded by Bret Taylor, reached a ~$15.8B valuation in a May 2026 round led by Tiger Global and GV.
Knowledge base →May 4, 2026
Funding: Sierra raised $950M Series E led by Tiger Global and Google's GV (with Benchmark,…
Sierra raised $950M Series E led by Tiger Global and Google's GV (with Benchmark, Sequoia, Greenoaks) at a $15.8B post-money valuation.
funding-research →May 7, 2026
Partnership: Cresta announced a strategic partnership with Atento on May 7, 2026 to deliver hybrid…
Cresta announced a strategic partnership with Atento on May 7, 2026 to deliver hybrid human-AI customer experience solutions.
funding-research →May 28, 2026
Product Launch: Cresta launched Cresta Synthetic Customers on May 28, 2026, providing realistic AI customer personas…
Cresta launched Cresta Synthetic Customers on May 28, 2026, providing realistic AI customer personas based on real conversations.
funding-research →Jun 1, 2026
Ada provides an AI customer-service automation platform used by enterprises to resolve support at…
Ada provides an AI customer-service automation platform used by enterprises to resolve support at scale.
Knowledge base →Jun 1, 2026
Voice is increasingly bundled into customer-service agents (Sierra and Decagon both ship voice) rather…
Voice is increasingly bundled into customer-service agents (Sierra and Decagon both ship voice) rather than sold as a standalone category.
Knowledge base →Jun 1, 2026
Decagon's AI agents typically resolve (deflect) ~70% of customer inquiries, the metric buyers price…
Decagon's AI agents typically resolve (deflect) ~70% of customer inquiries, the metric buyers price against.
Knowledge base →Jun 1, 2026
Cresta delivers generative AI for contact centers — real-time agent assist plus full automation.
Knowledge base →Jun 1, 2026
PolyAI builds voice AI that automates inbound customer-service phone calls for large brands.
Knowledge base →Jun 1, 2026
Customer service is the breakout enterprise-agent category in 2026, with vendors pricing on resolution…
Customer service is the breakout enterprise-agent category in 2026, with vendors pricing on resolution outcomes rather than per-seat licenses.
Knowledge base →Jun 1, 2026
Acquisition: Sierra acquired Opera Tech (Tokyo) to expand AI capabilities for Japanese enterprises.
funding-research →Jun 1, 2026
Acquisition: Sierra acquired Fragment (Paris) to expand agent-development capacity.
funding-research →
Milestones merged from 0 curated events, 10 verified facts (with observed dates), and 31 business signals from the last 24 months. Deduped by date + label; curated entries take precedence.
← Back to Customer Service Agents