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Segment

AcquiredYC S11YC Top Company

San Francisco, US · Founded 2011 · Tennessee LLC · 550 employees · 15 known investors

Segment is a customer data platform that collects, unifies, and activates first-party customer data from multiple touchpoints, enabling businesses to create unified customer profiles and orchestrate personalized experiences across 750+ integrations and destinations.

Also known as Twilio Segment

Data & InfrastructureEnterprise SoftwareMarketing TechSaaSB2BUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S11)

Segment was founded in 2011 by Ilya Volodarsky, Calvin French-Owen, Peter Reinhardt, and Ian Taylor.

IVIlya Volodarsky
Ilya Volodarskyin𝕏FounderCo-founder of Segment, a customer data platform that was acquired by Twilio in 2020. He now works at Wildfires.org, developing software and hardware to help plan and implement hazardous fuel treatment projects aimed at reducing catastrophic wildfires.30 Under 30 2015
CF
Calvin French-OwenCofounder30 Under 30 2015
PR
Peter ReinhardtCofounder30 Under 30 2015
IT
Ian TaylorCofounder30 Under 30 2015
JG
Jenn GarrettExecutive
AB
Andrew BeairdExecutive
MD
Mark DeutschmannExecutive

Investors · 15

Also in the syndicate · 1

Y Combinator Continuity Fundlead

Reported raises · per SEC filings

Form D private placements

$975K disclosed across 1 of 2 rounds · 2017

$975KraisedNov 2017 · 12 investors · Residential
Rule 506(b)
Officers, directors & promoters on the filing
  • Jenn GarrettExecutive Officer
  • Andrew BeairdExecutive Officer
  • VP Holdings LLCDirector
  • Mark DeutschmannExecutive Officer
Offering amount
$975K
Amount sold
$975K
First sale
Nov 2017
Incorporated
Limited Liability Company, Tennessee, 2017
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Company profile

researched Aug 2026

Segment is a customer data platform (CDP) offering software and APIs to collect, clean and control customer data. Businesses implement event tracking through a single Segment API rather than integrating a separate API for each downstream tool or database, and Segment then routes that data to analytics, marketing automation and data-warehouse destinations [2]. The product line is organized around Connections (a customer data pipeline that collects first-party data from every touchpoint and activates it to a data warehouse or one of 550+ destinations), and a combined CDP offering of Connections plus Unify and Engage for unified profiles, advanced audience building and real-time journey orchestration [0][1].

The company is now part of Twilio and is marketed as Twilio Segment; its website states that the Segment and Twilio sites are being merged, with Segment products, documentation and resources available and supported on Twilio.com, and that customers can combine Segment data with the wider Twilio platform for communications and AI [0][1]. Segment publishes an integrations catalog of 750+ integrations, plus recipes, GitHub libraries, documentation, a help center with an AI assistant, and a partner program for implementation and pre-built integrations [0][1].

Segment operates a public trust center describing its security and privacy program. Listed compliance frameworks include CCPA, GDPR, HIPAA, ISO/IEC 27001 (with a Statement of Applicability), ISO/IEC 27017:2015, ISO/IEC 27018:2019 and SOC 2, and the portal covers product security, data security, app security, access control, infrastructure (including Amazon Web Services), endpoint, network and corporate security, along with pentest and DR test reports [3].

Founding story

Segment was founded in 2011 and went through Y Combinator's Summer 2011 batch [2]. Three of the founders, including CEO Peter Reinhardt, dropped out of MIT to take part in the program [4]. The team spent about a year and a half pivoting without product-market fit, first building a classroom lecture tool and then an analytics tool, with roughly six months of runway remaining when they released a simple open-source JavaScript library on Hacker News; the strong response, and user requests for a hosted version, led to the pivot into a customer data platform [6]. A secondary profile lists the founders as Peter Reinhardt, Ilya Volodarsky, Calvin French-Owen and Ian Storm Taylor, motivated by the difficulty of collecting and managing customer event data across multiple platforms [5].

Business model

Segment sells a software/API platform on a self-serve and sales-assisted basis, with a free entry point ("Start for free"), published pricing pages for Connections and for the full CDP bundle, and a "Contact sales" motion for larger deals [0][1]. A description of its differentiation cites flexible pricing models scaling from startups to enterprises [5].

Subscription/usage-based software pricing for the Connections pipeline and the Connections + Unify + Engage CDP bundle, with separate published pricing for each product line [0][1]. Company history includes a period of growth around $12-13M ARR and a subsequent $20M ARR milestone reached after a pricing and packaging overhaul [6].

Traction

More than 15,000 customers as of July 2017, including Intuit, Atlassian and Gap [4]. Team size of 550 per Y Combinator [2]. A secondary profile states Segment serves over 25,000 companies and processes trillions of API calls annually [5]. The company reached roughly $12-13M ARR during a period of stalled growth and later hit a $20M ARR goal [6].

Latest developments

Segment's website announces that segment.com is being merged into Twilio.com, with the same CDP products, documentation and support available there [0][1]. Product positioning now emphasizes combining Segment data with the broader Twilio platform for communications and AI [0][1].

Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Positioned as a central customer data platform sitting between a company's data sources and its analytics and marketing tools; CEO Peter Reinhardt argued that rather than consolidating, the marketing/analytics tool landscape continues to fragment into specialized tools, increasing demand for data infrastructure that connects them [4]. Y Combinator classifies the company as SaaS/B2B [2].

A single API and large integration catalog remove the need to implement each downstream tool separately, and more than 200 tools had been built on top of Segment as of 2017, about 30% of them by third-party partners rather than Segment [4][2]. Additional cited differentiators include real-time event-driven collection, identity resolution and audience activation in one suite, warehouse-centric zero-copy architecture, developer tooling (SDKs, APIs, Terraform provider), and privacy/compliance capabilities [5][3].

Technology

A single event-collection API and SDK set gathers first-party data from websites, apps, servers and cloud services, then cleans and routes it in real time to a data warehouse or to 550+ destinations, with a broader catalog of 750+ integrations [0][1][2]. Layered products provide identity resolution and unified profiles (Unify) and audience building and journey orchestration (Engage), including use of warehouse data to enhance experiences [0][1]. Secondary descriptions characterize the architecture as event-driven with zero-copy use of the data warehouse as a source of truth, high-capacity event streaming, SDK libraries, pre-built integrations, and infrastructure-as-code support via APIs and a Terraform provider [5]. Infrastructure runs on Amazon Web Services and includes virtual private cloud, firewall, SIEM, logging and access-monitoring controls [3].

Go-to-market

Developer-led and self-serve entry via free sign-up, documentation, open-source libraries on GitHub, recipes and an integrations catalog, combined with a direct sales motion ("Contact sales") and a partner ecosystem for implementation and pre-built integrations [0][1]. Distribution now also runs through the Twilio platform and Twilio.com following the website merger [0][1]. Early growth came from launching an open-source JavaScript library on Hacker News, which reached the top of the site and generated thousands of GitHub stars and email signups, revealing demand for a hosted service [6].

Digital businesses of all sizes needing to unify fragmented customer data, spanning startups through large enterprises; named customers include Intuit, Atlassian and Gap, and data sources integrated include Stripe, Salesforce, Mailchimp and Zendesk [4]. Segment was initially adopted by startups, with the company later targeting large enterprises [4].

Geography

Headquartered in San Francisco [2][5]; the referenced sources do not detail additional office locations.

History

Founded in 2011 out of Y Combinator's Summer 2011 batch [2], Segment pivoted to customer data infrastructure after an open-source launch on Hacker News [6]. It raised a $64M Series C in July 2017 led by the Y Combinator Continuity Fund and GV, bringing total funding to $109M at the time, with Ali Rowghani joining the board [4]. A fractional CFO engagement beginning shortly after the seed round supported financial strategy, including a shift to annual prepayment terms to reduce burn; the company later worked through a growth slowdown at $12-13M ARR before reaching $20M ARR [6]. Segment was acquired by Twilio in a $3.2 billion deal, and Y Combinator lists its status as acquired [6][2]. Co-founder and CEO Peter Reinhardt subsequently became CEO of Charm Industrial [6]. In its current form the business operates as Twilio Segment, with its website being consolidated into Twilio.com [0][1].

Risks & controversies

One aggregator profile lists Segment's status as "Inactive" and reports $286.6M raised across five rounds, which conflicts with Y Combinator's "Acquired" status and with the $109M total funding reported at the 2017 Series C; these figures could not be reconciled from the available sources [5][2][4]. The consolidation of segment.com into Twilio.com indicates the brand is being folded into the parent company's web presence [0][1].

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Acquisition valueSep 2024$3.2B
ARRSep 2024$20M
Companies servedJan 202525,000 companies
CustomersJul 201715,000 customers
DestinationsJan 2025550 destinations
Employee rangeJan 2025501-1000
IntegrationsJan 2025750 integrations
Team sizeJan 2025550 employees
Tools built on top of SegmentJul 2017200 tools
Total funding raisedJul 2017$109M
Total funding raised (aggregator, conflicting)Jan 2025$286.6M

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Founder mafia

2 people who came through Segment went on to found or lead other companies.

Competitors · 10

by search overlap
Twilio218 shared keywordsTwilio provides a cloud-based communications platform that enables businesses to integrate voice, messaging, and video into applications using APIs. The platform combines communication channels, contextual data, and AI orchestration for enterprises and developers building customer experiences.
Hightouch110 shared keywordsHightouch builds a data activation platform that integrates with existing enterprise data infrastructure to enable marketing and business teams to activate customer data at scale. The platform combines customer data capabilities with AI technology for use by enterprise organizations.
Amplitude106 shared keywordsAmplitude provides an AI analytics platform that helps companies understand customer behavior and make data-driven product decisions. The platform serves product and engineering teams across enterprises looking to optimize user experience and digital innovation.
Zendesk88 shared keywordsThis is Zendesk's internal belonging/diversity and inclusion program page, not a company profile page for an external company. It describes Zendesk's internal culture initiatives and leadership development programs.
Netezza83 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
Tealium Inc. (Georgian Partners)81 shared keywordsTealium provides a customer data orchestration platform that collects, unifies, and activates customer data across real-time, cloud, and hybrid environments. The platform serves marketing, data, and analytics teams who need to build audiences, personalize experiences, and operationalize customer data across their technology stack.
Truera79 shared keywordsSnowflake is a fully managed cloud data platform that integrates data ingestion, processing, analysis, and AI application development across multiple cloud providers. It serves enterprise customers with unified security, governance, and infrastructure for building data and AI workloads.
Databricks74 shared keywordsDatabricks provides a unified platform for data engineering, analytics, and artificial intelligence, enabling organizations to build and deploy data and AI applications on cloud infrastructure.
Segments.ai64 shared keywordsSegments.ai provides a multi-sensor labeling platform for robotics and automotive companies. The platform is used for data annotation and labeling in autonomous vehicle and robotics development.
Rudderstack63 shared keywordsRudderStack provides real-time event data transformation, letting engineering and data teams modify, clean, enrich, and govern event data in flight using JavaScript or Python before it reaches downstream tools. Its Transformations feature supports data privacy, quality controls, custom integrations, and advanced use cases like real-time personalization and activations.

Companies competing with Segment for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 5

launches, deals, and filings
Jan 2025
segment.com consolidated into Twilio.com

Segment announced it is merging its website into Twilio.com, where the same CDP products, documentation, resources and support are available.

source ↗

Apr 2021
Segment acquired by Twilio

Segment was acquired by Twilio in a deal described as a $3.2 billion exit; Y Combinator lists the company's status as acquired, and Segment now operates as Twilio Segment.

$3.2B source ↗

Jul 2017
Segment raises $64M Series C led by Y Combinator Continuity Fund and GV

Series C of $64 million led by the Y Combinator Continuity Fund and GV, with participation from existing investors Accel, Thrive Capital, SV Angel and NEA; brought total funding to $109M.

$64M source ↗

Jul 2017
Ali Rowghani joins Segment's board of directors

As part of the Series C, Y Combinator Continuity Fund lead and former Twitter COO Ali Rowghani joined Segment's board.

source ↗

Jan 2011
Y Combinator Summer 2011 batch

Segment participated in Y Combinator's Summer 2011 batch; three founders, including CEO Peter Reinhardt, dropped out of MIT to attend.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
SegmentTennessee

In the news

Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Segment do?
Twilio-owned customer data platform that collects, unifies and routes first-party customer data to hundreds of tools.
Who founded Segment?
Segment was founded by Ilya Volodarsky, Calvin French-Owen, Peter Reinhardt, Ian Taylor in 2011.
Who are Segment's investors?
Segment's investors include Accel, Converge, Founders Circle Capital, Greycroft, GV (Google Ventures), Headline, Headline Growth Management, LLC, Kleiner Perkins and 6 more.
How much funding has Segment raised?
Segment has disclosed $975K raised across 1 of its 2 known rounds.
Where is Segment headquartered?
Segment is headquartered in San Francisco, US.