What happened Shares of Twilio (NYSE: TWLO) gained 24.7% in January, according to data from S&P Global Market Intelligence. The online communications software company's stock has been super hot even when confidence in the overall market has wavered, and its momentum continued in January as the broader market rebounded from its late 2018 sell-offs. TWLO data by YCharts Strong sales and earnings momentum and what looks like a long runway for growth have helped push the stock up more than 660% from its $15 IPO price in 2016. This impressive performance also meant that the company's all-stock acquisition of email API and marketing company SendGrid, which closed on Feb. 1, was announced in mid-October and initially valued at $2 billion, was a $3 billion deal when it was all said and done. Image source: Getty Images. So what Twilio provides cloud-based messaging and call software; it has seen adoption for its services in popular and fast-growing apps like Uber, Airbnb, and Facebook's WhatsApp power the business to strong growth. The company's customer base is growing at a rapid clip (rising 31% year over year in the September quarter to surpass 61,000). Strong earnings performance and expectations that there are still plenty of untapped monetization opportunities that could increase the business' average revenue per customer are translating to market-crushing stock performance. Now what Twilio is set to report fourth-quarter earnings after market close on Feb. 12. The company is guiding for sales to come in between $183 million and $185 million, representing year-over-year growth of roughly 60% at the midpoint of the target. Adjusted earnings per share are expected to be between $0.03 and $0.04, up from an adjusted loss per share of $0.03 in the prior-year period. 10 stocks we like better than TwilioWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has quadrupled the market.* David and Tom just revealed what they believe are the 10 best stocks for investors to buy right now... and Twilio wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of January 31, 2019Keith Noonan has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Facebook and Twilio. The Motley Fool has a disclosure policy.