Mailgun

Modern Email Platform for Developers
APIs that allow developers and their apps to send, receive, track and store emails effortlessly.

EasyPost

Bad entry?

Shipping for Developers
EasyPost is a simple shipping API for developers. Now developers can add shipping from the US Postal Service, FedEx, UPS, and DHL into their apps in minutes. We believe that verifying addresses, checking rates, purchasing postage, and tracking packages should be ...

CircleCI

Bad entry?

Continuous Integration and Deployment
CircleCI provides development and software teams the confidence to build, test, and deploy—quickly and consistently—across numerous platforms. Built to address the demanding needs for today's application development environments, CircleCI supports all types of ...

Koding

Bad entry?

Browser-based New Generation Software Development Platform
Koding is a feature rich cloud-based development environment complete with free VMs, an attractive IDE & sudo level terminal access. The Koding platform provides all you need to move your software development to the cloud. You will be up and running in minutes ...

SnowShoe Stamp

Bad entry?

Engage your customers with a touch of plastic.
SnowShoe Stamps are small pieces of plastic with secret digital identities. Our stamps allow mobile game developers to sell toys that link to in-game content (Skylanders for mobile). At the same time, our stamps have been used as a physical factor of authentication ...

Light Table

Bad entry?

A new environment for creating software - YC S12
Light Table is a new interactive IDE that lets you modify running programs and embed anything from websites to games. It gives real time feedback on the changes you make to your code, and shows how data values flow through your entire program. As such, Light Table ...

Iron.io

Bad entry?

High Performance Message Queuing and Task Processing
Iron.io is the maker of IronMQ, an industrial-strength message queue, and IronWorker, a high-concurrency task processing/event-based computing service. Every production system uses queues and worker systems to connect systems, power background processing, process ...

Particle (formerly Spark)

Bad entry?

A hardware/software platform for the Internet of Things.
Particle OS is an open source operating system for the Internet of Things that runs in the cloud. We provide easy to use hardware development tools for connected products, a complete tech stack for a connected product that extends from the device itself to the ...

Open Source Syndicate

Bad entry?

∑ (valuation increases from our deals) > $1 BILLION
A syndicate that invests in open-source and developer related products.

Zillabyte

Bad entry?

Cloud platform for data analysis.
Zillabyte is a cloud platform for data analysis. Build apps, not infrastructure.

Apportable

Bad entry?

Objective-C for Android
The Apportable compiler turns Objective-C iOS programs into native Android machine machine code. Develop for iOS and get an Android app automatically! Companies are spending $300 billion on salaries of Android developers when they should be writing their apps ...

Runnable

Bad entry?

The YouTube of Code
Runnable is building the YouTube of code. Read more about us here Forbes http://www.forbes.com/sites/anthonykosner/2013/10/02/runnable-aims-to-be-the-youtube-of-code-only-with-less-cat-videos/ TechCrunch http://techcrunch.com/2013/10/02/runnable-wants-to-become-the-youtube-of-code/ Wired http://www.wired.com/wiredenterprise/2013/10/runnable/ Gigaom http://gigaom.com/2013/10/02/startup-runnable-fancies-itself-as-the-youtube-of-code/

GitHub

Bad entry?

Help people build software together.
GitHub is the best place to share code with friends, co-workers, classmates, and complete strangers. Over two million people use GitHub to build amazing things together. With the collaborative features of GitHub.com, our desktop and mobile apps, and GitHub Enterprise, ...

Stripe

Bad entry?

Web and mobile payments, built for developers.

CodeFights

Bad entry?

Programming Gamified
CodeFights is the first platform that lets developers have fun while solving programming challenges in a real-time PvP setting. The bite-sized nature of our challenges makes it easy to get started and just as easy to get addicted to CodeFighting. Check it out ...

DotCloud

Bad entry?

Cloud application platform
DotCloud is a 2nd-generation platform-as-a-service. It makes it incredibly simple for developers to deploy and scale their applications, while at the same time delivering the flexibility and robustness required by critical business software. Developers can mix ...

Coderbuddy

Bad entry?

Helping startups & companies grow metrics & ship product leveraging our developers
Coderbuddy is solving the software development capacity shortage, and is founded by Social Networking pioneer and Napster investor Adrian Scott. We're creating a disruptive platform starting with a web-based development, testing & publishing environment, adding ...

Firebase

Bad entry?

The Realtime Application Platform
Firebase lets you build real-time, collaborative apps in a fraction of the time it used to take. We store and synchronizes your app's data between clients (web browser & phones) in miliseconds. We're used by 50,000 developers and are growing 20% per month. Games, ...

Interstate

Bad entry?

The future of open project management
Interstate provides a way for companies to get more from their project management flow. With Interstate you can secure more users and sales by being more transparent and open with your customers and potential tire kickers. Our users can embed their projects anywhere ...

Hired

Bad entry?

The Marketplace for Talent
Hired makes hiring, or getting hired, less painful through a two-sided marketplace that connects top talent with over 1,600 fast-growing companies. Hired is the only marketplace designed to give job seekers transparency and control over their job search with one ...

Bugsnag

Bad entry?

Automatic crash detection for web and mobile apps
Bugsnag is the world’s best automated crash monitoring system. We allow software teams to ship their web and mobile apps up to 2x faster by giving actionable insights into crashes. We already work with some of the world's fastest growing and most innovative companies ...

Eligible

Bad entry?

Stripe for Health Care Transactions - YCS12
Eligible makes it simple for healthcare companies to pass and receive financial transactions with over 1,000 health insurance companies across the country. Transactions include queries to determine patient’s health coverage for certain services, claims (invoice) ...

Apiary

Bad entry?

Build beautiful APIs
Apiary is on a mission to disrupt the way APIs are built and used. Apiary does for APIs what GitHub did for coding. Apiary provides hosted PaaS platform helping companies design and develop APIs faster, support their API customers. The core of the self-service ...

Keen IO

Bad entry?

Custom Analytics by API
Keen IO is an API platform that lets developers collect and study custom events at a massive scale. An "event" is a pretty broad abstraction, so let's unpack that a bit: Every time someone loads a webpage, clicks a link, draws a breath, takes a step, pauses a ...

Algolia

Bad entry?

Search as a Service. We enable developers to deliver an outstanding search experience.
Founded in 2012, Algolia provides a hosted search API that allows websites and mobile applications to increase user engagement and conversions. Algolia API returns search results in milliseconds, with a search-as-you-type experience for their end users. Algolia ...

OpenSilo

Bad entry?

Customer Support when call centers don't cut it (AngelPad #8)
OpenSilo makes it simple for companies selling technical products to better support and understand their customers, at scale.

Rollbar

Bad entry?

Fix bugs faster with more data
Rollbar is a full-stack error monitoring platform. Developers use it to find, reproduce, and fix bugs many times faster than legacy solutions (like digging through log files or responding to customer support issues). It works by integrating into each part of the ...

Loggly

Bad entry?

Cloud-based log management
*** What is Loggly? *** Loggly is a SaaS solution for log data management. With Loggly you’re able to bring logs from the depths of your entire infrastructure to one place where you can track activity and analyze trends. Best of all, because Loggly is a managed ...

ZenHub

Bad entry?

Supercharge your team's GitHub workflow
ZenHub enhances every GitHub workflow with features built specifically for startups, fast-moving engineering teams, and the open-source community. ZenHub: * Adds a strategic layer to your tactical tool: if you are a software company your team already lives on ...

Runscope

Bad entry?

API debugging and testing tools for app developers. Everything is going to be 200 OK™
Log, monitor and measure your API usage to solve API problems fast. Runscope provides tools for app developers to better understand the impact APIs are having on their application performance. Log traffic from any language or framework to any API to debug problems. ...

ReadMe.io

Bad entry?

Beautiful documentation made easy. (YC W15)
ReadMe provides every company the ability to easily create beautiful documentation, and build loyal, productive developer communities. With ReadMe, build developer portals that combine support, tutorials, topical guides and API exploration. ReadMe makes it trivial ...

Supplyframe

Bad entry?

Organizing the world of engineering knowledge. Helping build better hardware products.
Search and Data Platform for Electronics Industry. Data-driven products impacting research, design and collaboration aspects of hardware product development.

drone.io

Bad entry?

Continuous Integration platform built on Docker
Drone is an open source Continuous Integration and Deployment solution built on Docker. Drone is perfect for organizations that want a modern replacement to Jenkins. It takes just a few clicks to setup and run on your own server infrastructure, like Jenkins. We ...

Mode

Bad entry?

Collaborative Analytics Platform
Mode is a fast-growing startup building software that gives analytics teams superpowers. We're making businesses and communities more analytical with collaborative tools for data analysts. We're building the most advanced web-based environment for creating, sharing, ...

TenXer

Bad entry?

Helping software development managers be better managers.
tenXer helps software development managers know who on their team needs help and how to help them. Using the data that already exists in tools like Pivotal Tracker, JIRA and GitHub, tenXer identifies and highlights the relevant information that engineering managers ...

NudgePad

Bad entry?

NudgePad is an IDE in your browser
NudgePad is an IDE for prototyping in your browser. It allows anyone to launch a fully hosted custom app in two seconds. NudgePad removes all the pain and complication of starting a project, including server setup, deploying, cloning, version control, SSL, DNS, ...

Appurify

Bad entry?

True continuous integration testing and debugging for mobile
Appurify is a platform that provides live and API access to fully-configurable, real mobile devices in the cloud, accompanied by powerful testing and debugging tools. Appurify will help you find and fix bugs before your users, speed up development and testing ...

Commando.io

Bad entry?

Manage servers easily online.
Commando.io is a simpler way to manage servers online. Commando.io makes it simple to execute commands on groups of servers from a beautiful web interface. DropBox simplified online storage, GitHub simplified revision control, Commando.io simplifies server orchestration ...

Knowtify.io

Bad entry?

Engagement Marketing platform for software companies
Knowtify.io is the first Engagement Marketing platform specifically designed to help software companies market to their EXISTING users - driving longterm engagement and increasing customer lifetime value. We offer the marketer a powerful tool that combines insights ...

BugSense

Bad entry?

Mobile App Insights
Bugsense is the leading mobile app diagnostics service. More than 30000 developers & companies like Samsung, Soundcloud and Trulia use Bugsense in order detect errors in their apps. Usually developers don't know anything or just have limited information about ...

Singly

Bad entry?

Singly provides the fabric for today’s connected apps.
Singly provides the fabric for today’s most connected apps, empowering a new class of developers to create powerful new apps. Using our world class app connection platform, app creators can build remarkable in-app experiences with social integration, auth, data ...

cisimple

Bad entry?

CI for Mobile (exit: acq'd by ElectricCloud May '14)
cisimple is a continuous integration platform designed specifically for mobile. By automating builds, test execution and beta distribution we help developers find problems faster and respond to them immediately. Our incredibly streamlined setup process takes ...

HashRabbit

Bad entry?

Enterprise-grade bitcoin mining platform
HashRabbit is an enterprise-grade bitcoin mining platform. Our apps and developer tools help large mining facilities grow efficiently and easily. We provide valuable realtime data about your operation, even if you're a million miles away. Easily control and monitor ...

VoiceLayer

Bad entry?

Integrate realtime Push-to-Talk into any App
VoiceLayer's PaaS/SDK enables developers to easily add realtime push-to-talk messaging to any mobile or desktop web application. All messages are stored in the cloud for anytime playback. VoiceLayer is great for myriad app types, including field force, construction, ...

Snip2Code

Bad entry?

Where Coders Share Snippets
Snip2Code is a web service for software developers to collect, organize and share code snippets. By seamlessly integrating within development environment daily used by programmers, Snip2Code adoption can cut by 20% the development life-cycle of a project. Not to ...

RealityCap

Bad entry?

Spatial sensing for mobile devices
We sell a mobile augmented reality (AR) platform. It is built on our patented 6 degree-of-freedom tracking that combines inertial sensing with simultaneous localization and mapping (SLAM) on mobile devices. We are the only AR platform offering SLAM with a deep ...

LaunchDarkly

Bad entry?

Deliver, measure and control software
LaunchDarkly solves the biggest pains around effective continuous delivery, allowing software teams to move faster with less risk. Developers use our feature flags as a service to easily manage the whole feature lifecycle from launch to sunsetting. LaunchDarkly ...

Kimono Labs

Bad entry?

Create an API for any website from your browser
Kimono Labs allows anyone to turn any website into a structured API in seconds. Kimono is making it easy to find data by eliminating the need to code or install any software for extraction.

Arbiter

Bad entry?

Real money betting in games
Arbiter is a service for game developers to have their players competing against each other with real money on the line.

What's the matter with this startup?

Explore San Francisco Startups

49 developer tools Startups View all

Mailgun

EasyPost

CircleCI

Koding

SnowShoe Stamp

Light Table

Iron.io

Particle (formerly Spark)

Open Source Syndicate

Zillabyte

Apportable

Runnable

GitHub

Stripe

CodeFights

DotCloud

Coderbuddy

Firebase

Interstate

Hired

Bugsnag

Eligible

Apiary

Keen IO

Algolia

OpenSilo

Rollbar

Loggly

ZenHub

Runscope

ReadMe.io

Supplyframe

drone.io

Mode

TenXer

NudgePad

Appurify

Commando.io

Knowtify.io

BugSense

Singly

cisimple

HashRabbit

VoiceLayer

Snip2Code

RealityCap

LaunchDarkly

Kimono Labs

Arbiter

Keep in touch :)