Arena: Market Conditions Before Twilio
Web developers adding calls or texts to their applications · 2008 · United States first, reaching carrier networks worldwide
Barriers to participationEssential supplier control
In 2008 a software company that wanted its product to place a phone call went through the telephone carriers, which controlled the network. Adding calling meant running lines into a data center, buying and racking hardware, licensing a telephony software stack and paying for professional services; carriers quoted two to three years and two to three million dollars TWX-1. Open-source systems such as Asterisk cut the licence cost but were complex to use, even for experienced developers TWX-2. Web developers measured their work in weeks, and a startup could not spend years and millions before knowing whether a feature was worth having, so calls and texts stayed out of most applications TWX-1 TW1.
How each step happened
Step 1 of 5 · 2008–10
Telecom as a web API, billed by the minute
Twilio's innovation was to sell the phone network as a web API. Its private beta in November 2008 reduced voice calling to five web commands, say, play, record, dial and gather, that a web developer could use with the skills and servers they already had; TechCrunch showed the core of Google's GrandCentral calling service rebuilt in about 15 lines of code TWX-2 TWX-3. A job that had needed a carrier project and telecom specialists became something an ordinary web developer could ship, priced by the minute with no contract TWX-1 TWX-2. That settled whom Twilio would sell to: developers building applications, not telecom buyers.
The choice came from Jeff Lawson's own work. He had started three companies that each needed to communicate with their customers, and had been one of the first product managers at Amazon Web Services TWX-1. Before founding Twilio he asked developers whether they would use a telephone API, and they named uses such as order notifications for online stores TWX-1. Voice came first; SMS followed about 18 months after founding and became the larger product TWX-1 TWX-3.
Rivals Before Twilio the options were carrier projects or open-source Asterisk TWX-1 TWX-2. Nexmo, founded in 2011 by Tony Jamous after 12 years in wholesale messaging, offered SMS only and placed itself low in the value chain, close to the carriers; by 2013 Jamous said its APIs were as easy as Twilio's, so the two differed in whom they served, not in ease TWX-6 TWX-8 TWX-7.
Democratize the Expert TaskDeveloper-First StrategyFounder Domain Expertise
Step 2 of 5 · 2008–16
Free trial, then the bill grows with the app
The price had to fit a developer with an idea and no budget. Twilio launched with no contracts, charging 3 cents a minute and $5 a month for each phone number TWX-2 TWX-3. By its 2016 IPO filing the path was set: developers built on a free trial, then entered a credit card and paid only for what their application used, and the substantial majority of customers had arrived this way without a salesperson TW1. In the filing's words, 'we acquire developers like consumers and enable them to spend like enterprises' TW1.
Metered billing tied Twilio's revenue to the success of each customer's application. As an app gained users it sent more messages and placed more calls, and customers added new uses for products they already had TW1. The dollar-based net expansion rate, which compares what existing customers spent in a year with what the same customers spent the year before, was 155% in 2015 TW1.
Rivals Nexmo aimed at the other end. Jamous said its model was better suited to large-volume applications, selling high-volume SMS at wholesale prices to Airbnb and the messaging apps Line and Viber TWX-7 TWX-8. A wholesale price list rewards senders who already have volume; a free trial serves developers who have yet to find it.
Usage-Based PricingFree Trial
Step 3 of 5 · 2009–16
Evangelists and hackathons recruit developers one by one
Twilio went out to find developers in person. Its first employee, Danielle Morrill, joined in March 2009 with a mandate to acquire customers and build the developer community, and grew it from a few hundred to more than 100,000 developers with a distributed team of evangelists TWX-4. Lawson describes sponsoring and running hackathons and giving away t-shirts TWX-1. By 2015 the evangelism team, all of them developers, ran or joined about 500 events a year, and Twilio held its first SIGNAL developer conference that year TWX-5 TW1.
The events worked because of step 2. A developer who learned at a hackathon how to add a call or a text to an app could start using Twilio at work the next day on a free trial, without anyone's approval. The IPO filing credits this community work with the rapid adoption of the platform; by March 2016 more than 900,000 developer accounts had been registered TW1.
Rivals Nexmo started a developer relations team only in mid-2016, after the Vonage sale; in its first year it had eight people and ran 49 events TWX-9. Twilio's team had been running about ten times as many events a year since at least 2015 TWX-5.
Practitioner Community
Step 4 of 5 · 2011–16
Developers pull Twilio into companies; sales follows the usage
Developers brought Twilio into their employers, and sales followed the usage. Uber embedded Twilio messaging in 2011 to tell riders when a driver had accepted and was arriving; HubSpot built calling into its marketing software, and Nordstrom gave its salespeople an app for texting customers TW1. WhatsApp used Twilio to verify new users and was 17% of Twilio's revenue in 2015 TW1. Once a customer's spending passed a set level, Twilio assigned account managers or customer success staff to keep it satisfied and expand its use TW1.
In 2014 Twilio addressed the executives above the developers, with billboards telling them to ask their developers, who already chose services such as Stripe and Amazon Web Services quickly and cheaply TWX-1. Revenue rose from $49.9 million in 2013 to $166.9 million in 2015, and active customer accounts passed 28,000 by March 2016 TW1.
Rivals Nexmo reached $61 million of revenue in 2015, second in the market, with two-thirds of its messaging revenue from international customers; Vonage bought it for $230 million in May 2016 TWX-6. Twilio's 2015 revenue was nearly three times as large TW1.
Product-Led Sales
Step 5 of 5 · 2016–25
The default choice for programmable communications
After the IPO Twilio's position rested on being developers' first choice, not on a barrier. In 2021 Synergy Research ranked it first worldwide in communications platforms sold as APIs (CPaaS), and Lawson counted 10 million developers and 200,000 customers TWX-13 TWX-1. In 2025 revenue reached $5.07 billion, with more than 402,000 active customer accounts TW6. Twilio's connections to carriers around the world, which it calls the Super Network, route traffic behind the API TW1. They make the service work in many countries but give no exclusive access: carriers sell to rivals too, and Nexmo connected to 650 of them TWX-6.
Customers can leave. Uber cut its use, falling from 14% of Twilio's revenue in 2016 to 8% in 2017, and the annual report says customers using limited functions can replace Twilio more easily or use several providers at once TW2. Applications built on many Twilio functions are costlier to move. Net expansion fell from 155% in 2015 to 104% in 2024 before recovering to 108% in 2025 TW1 TW6, and Lawson says Twilio does not think about lock-in, only about earning customers' business every day TWX-1.
Buying wider
Twilio then bought adjacent products: SendGrid added email in February 2019 in a deal valued at about $3 billion, and Segment added customer data in November 2020 at about $3.2 billion, to move from sending messages toward managing customer engagement TW3 TW4. Owning the products did not make them one platform. A March 2024 review found Segment underperforming and set new operating targets TW5; in 2025 Twilio reported GAAP operating income of $158 million, after a loss in 2024 TW6.
What kept Twilio ahead of Nexmo was steps 1 to 4 in order: an API any web developer could try, a bill that grew with the app, events that taught developers to use it, and sales that followed their usage into companies. Nexmo matched the API by 2013 but began courting developers seven years later.
Rivals An analyst in 2019 credited Nexmo, by then part of Vonage, with promoting the category well TWX-10. Vonage held 7% of the API market when Ericsson agreed to buy it in 2021, and in October 2023 Ericsson wrote off about half of Vonage's goodwill and intangibles TWX-11 TWX-12.
M&A StrategyMulti-Product