In 2015, Filestack moved to San Antonio from San Francisco.

The startup, founded in 2012 by four MIT students and a graduate of the Y Combinator program, raised $1.8 million in seed stage capital from Andreessen Horowitz, Highland Capital and SV Angel. It also received additional funding from Xenon Ventures.

The company grew quickly and became the number one developer tool for file uploads with more than 100 million files uploaded by 2014.

But the company ran into some difficulties and the founders wanted out, said Pat Matthews, who runs the company now as Chief Executive Officer.

In 2015, Scaleworks, a San Antonio-based company run by Lew Moorman, former Rackspace executive, bought Filepicker, the company’s former name and rebranded it to Filestack. He also brought on Matthews, a former Rackspace executive and co-founder of Webmail.us, which Rackspace acquired. Matthews had left Rackspace and served as a mentor and angel investor to Austin and San Antonio startups.

Since taking over as the leader at Filestack, the company has grown even more. It recently reached the milestone of achieving $250,000 a month in revenue for projected annual revenue of $3 million this year, Matthews said.

“We have really accelerated the growth of the business.,” Matthews said. “We’ve really doubled the business in the last 15 months.”

The company is based in downtown San Antonio at 118 Broadway. It has 20 employees locally and a team of 10 employees in Krakow, Poland.

“In a nutshell, we rebranded, renamed, relaunched the company,” Matthews said. “We’ve made it a lot more relevant in the industry.”

Filestack’s customers are software developers. The company creates software that allows developers to integrate file uploading capabilities into whatever software application they are building. More than 50,000 developers use Filestack including companies like Virgin, Zenefits, Buzzfeed and Class Dojo.

Today when software developers build new products they try to find ubiquitous tools that they can just pull into their product and not have to build from scratch, Matthews said. For example, software developers often use Strike or PayPal when they need to accept payments from a customer in an application or Twilio for SMS messaging capabilities. To create file embedding technologies into a mobile app, developers often turn to Filestack, Matthews said.

Filestack can transform images, video, documents and bring Instagram like capabilities to every app or website, Matthews said. It has many applications like human resources software that allows everyone in a company to upload a profile picture, he said.

Other big applications for the technology is in the education space, Matthews said. The Filestack technology gives teachers the ability to upload PowerPoint decks in a mobile education app.

“Developers don’t want to spend time on creating new uploading technologies,” Matthews said.

Filestack works as a software as a service business with plans ranging from free to $299 a month. The company also just announced a $4999 a month plan with unlimited uploads and standard image and document transformations.

On Wednesday, Filestack announced the release of its completely redesigned embeddable file picker. Its new features include “accelerated uploads for large files, uploads optimized for unreliable mobile connections that are capable of resuming upload where they were cut off, enhanced image recognition services, and a new unlimited upload plan for high volume customers,” according to a news release.

The new features of Filestack’s API help developers deal with the huge growth of user generated content, Matthews said. Filestack also connects to more than 25 social networks and cloud drives including Facebook, Instagram, Box, Dropbox and Amazon.