What is Micro? It's just the future of microservices development.

Micro is an open source project focused on simplifying microservices development. It started life as go-micro - a Go framework for microservice development. But even before then, go-micro, was a hacked up tiny library created to enable the development of a “kubernetes as a service” project way back when in 2014 (see the first commit here).

Go Micro was an idea born out of that attempt to build kubernetes as a service, which was written as a set of microservices, but ultimately was too early and scrapped not long after being built. What was left behind though was the kernel of something else, a handful of packages which if you squinted hard enough looked like the basis for a framework.

2014: In the beginning

At the time microservices was a hot topic but tooling was sparse. People spoke of the benefits of this form of architecture and development at their organisations but nobody really had the opportunity to open source their tools including our team at Hailo.

I had noticed a pattern back then. A developer joined a company for a couple years, helped build a platform and set of services for the business, only to leave and then have to go do it all over again at the next company, with no ability to carry over the tools of the first. This really frustrated me. Especially because if the right tools existed as open source software we wouldn’t have to continually go through this process and perhaps we’d be focusing on more interesting problems. Not to mention we’d probably save 6-9 months of our lives at the very least.

This started to get me thinking about a way for many companies to rally around a single solution. I knew a few things though. Every organisation had different skills, different infrastructure preferences and adopting new tools was often a big hurdle.

With that in mind my idea was to start with a very lightweight yet opinionated framework for microservices development. Knowing how this approach had benefited us at Hailo it felt like it might resonate with other developers too. So over the next couple of months I started to work on what eventually formed the initial go-micro framework.

2015: Open sourcing go-micro

In early 2015 I decided to open source go-micro. I was deathly afraid of the idea considering I’d never really actively publicised a project before and was worried about the quality of my code but there wasn’t much to lose really. Go Micro felt like something worth sharing.

As with a lot of open source projects, I posted to Hacker News. It didn’t really get any comments, I can’t even remember if it was on the front page but what I do remember is hitting 300 stars within a few days!

I don’t have a quick view of the earliest release on github but thankfully Brian Ketelsen, a good friend and strong advocate of Micro forked it back then. You can see that code at github.com/bketelsen/go-micro and from it it’s clear there was a few packages outlining a method of microservices communication.

Go Micro at the time included a registry for service discovery, server for RPC and protobuf based request handling and a client to call those services by name. It even included a key-value storage package but we later removed this to focus entirely on communication first (we’ve recently added it back in).

Micro: A microservices toolkit

Somewhere in mid-2015 I came to the realisation that a framework was not enough. Once you’d written those services there needed to be a way to access them, to serve them, and to consume them by traditional means. This is where I began to think about a toolkit.

In a lot of cases we see open source tools which try to solve one problem. State, load balancing, messaging, etc but in the case of microservices you really needed a holistic system that would cover all the bases in a seamless way. Something that would essentially form the foundations of a platform.

In that Micro was born. Micro was built as a toolkit to enable the development of a microservices platform. It contained a CLI, Web dashboard and API gateway along with a sidecar for non Go based applications. That sidecar pattern has now evolved into something called “service mesh” but back then Netflix had this thing called Prana which is what the Micro sidecar was based on.

Micro and Go Micro were my full focus for the rest of 2015 and took a significant period of time to develop but in Autumn of that year a few companies started to use it in production which gave me hope that it may thrive in the years to come.

2016: Validating the tooling

In 2016 I decided it was time to test the waters once more. To let the world know about Micro and drum up some traction. I went to Hacker News once more, only this time, things went a bit differently https://news.ycombinator.com/item?id=11327679.

Hacker News responded positively and Micro shot to the top of the front page. Here’s the original blog post for those interested in reading it https://micro.mu/blog/2016/03/20/micro.html.

It was clear there was something here, that there might be a demand for such a set of tools, and I wanted to pursue it full time. Back then I got the opportunity to work with Sixt through a corporate sponsorship. This allowed me to work full time on Micro and use them as a feedback loop for it’s features and development.

I’m incredibly grateful to Sixt for that opportunity and what it allowed Micro to become. Without them it’s unclear if it would have made it to where it is today. The sponsorship let me continue to iterate on the tools as a solo effort for a few years. 3 years in fact.

And in that time, Micro grew, from a small open source project, to one with a community of 1k+ members, thousands of GitHub stars, but more importantly use in the real world in production.

2019: The evolution of Micro

Fast forward to the present. Earlier this year I got the opportunity to take Micro from a solo bootstrapped open source project and turn it into a venture funded company with the potential to change microservices development on a much larger scale.

We’re not ready to reveal all the details just yet but what I will say is it’s enabled us to start executing on what many of us developers long for. The ability to build, share and collaborate on services in the cloud and beyond, without the hassle of managing infrastructure.


The progress we’ve made as a small team in 6 months is pretty astounding. Having committed more times in that period than I had done in the entire 4 years of working on Micro alone.

And as you can see here, if GitHub stars are a measure of anything, it reflects in our awareness, popularity and usage. We recently passed the 10k star mark on the go-micro framework and it feels as though we’re just getting started with what’s possible.

You can probably tell exactly where we went from 1 person to 2. Based on this progress I’m fairly confident in my previous assumption that go-micro will go on to become the most dominant Go framework and likely surpass Spring adoption globally within the next decade.

Micro as a Runtime

Micro has also progressed significantly as we’ve moved on from just a sparse set of tools to something we’re now calling a microservice runtime environment.

The idea behind this is to reorient the toolkit to be a full fledged environment for building microservices. One which provides a programmable abstraction layer for the underlying infrastructure built as microservices themselves.

This image is a little old but you’ll get the idea. By abstracting away the underlying infrastructure and creating it as a set of services that all look the same, run the same, feel the same we end up with a programmable runtime that acts as a foundation for all development, whether it be local, in docker or on kubernetes in the cloud.

We also redefine the boundaries between development and operations in a way that allows each side to focus on their roles without the cognitive load of understanding the other side. In the developers case, we no longer have to reason about infrastructure just code.

The feature set is fairly extensive and growing.

Micro as a Platform

Even still while Micro as a runtime and having a Go framework for development solves a lot of problems, this isn’t enough. So Micro continues to evolve. It’s no longer enough to just simply provide the tools for building microservices, we also need to provide the environment in which to share and consume them. We at Micro are now building a global shared microservices platform for developers by developers.

What does that really mean? Well imagine the platform you’re given to work on when you join a company or all of the things you have to do from an infrastructure perspective just to get up and running. We’re going to provide this as a service to everyone.

A fully managed serverless platform for microservices development (that’s a mouthful).


I’ve become frustrated with the status quo and the way in which developers are now forced to reason about infrastructure and cloud-native complexity. The barrier to entry in just getting started is too high. Building services in the cloud should be getting vastly easier, not harder.

Just take a look at the cloud-native landscape…

Having to reason about this as a developer is horrible. All I want to do is write and ship software but now I’m expected to walk some arduous path of containers, container orchestration, docker, kubernetes, service mesh, etc, etc. Why can’t I just write code and run it?


You’re probably thinking. Ok that’s great, I buy into this vision. Simpler app development without managing infrastructure but what’s microservices got to do with this?

We firmly believe that all forms of development at scale inevitably end up as distributed systems and the pattern for that development is now largely known as microservices.

Microservices unlock a huge productivity boost in the companies that adopt them and the velocity of their development is such that with every new service added their is compounding value in the system built.

I also believe that developers need a platform that enables this form of development for them to thrive. One in which they do not have to reason about infrastructure and where they are provided the tools that empower them to build software at scale without having to worry about operating large scale systems.

One highly controversial example I want to share is from the startup bank Monzo.

Monzo opted to pursue a microservices architecture from day 1. Knowing there were initial operational tradeoffs to this approach but with an insight from their time at Hailo, they knew if the company succeeded on the product side they’d need a scalable platform to help them grow and move fast.

This led to the creation of a platform that is now host to 1500 services. This might sound hard to reason about, but a shared platform where every developer has the ability to consume and reuse existing services is a fundamentally powerful thing.

Not only that, but when the platform is managed for you, developers can get back to focusing on what’s really important. The product and the business.

Our solution

This form of development has largely been siloed at large tech cos capable of building such systems. But what if this was available to every developer as a shared system outside of those large orgs. What if we were able to collaborate across org and across teams. What would the velocity of our development as an industry look like as a whole?

I would argue that all technology would advance faster than it ever has done in the decades that have come before us. We would finally capture the true potential of the internet.

GitHub was a prime example of this collaboration and innovation in open source, massively reducing the pain of hosting source code and creating an environment for reusing code. However there’s just one but, this source code largely sits at rest on their platform.

What if instead of just sharing code and running it in silos, we shared an environment for software development, one in which we could collaborate on services, reusing each others running applications where necessary and focusing on solving higher order problems.

It would have it’s own quirks and challenges but the opportunities such a platform presents is immense. And something we want to explore at Micro, the company.

So that’s what we’re setting out to do really. To build a global shared services platform for developers by developers. Where the pains of cloud, kubernetes and everything else will no longer be felt. An environment in which we can build, share and collaborate on micro services based on the go-micro framework.


The future of Micro is one which involves rapidly reducing the friction for developers in harnessing the power of the cloud and to empower them to build microservices from anywhere, with anyone.

If this sounds interesting to you, come join our community on slack, kick the tyres on the go-micro framework or come help us make it a reality. We’re hiring, just drop us an email at [email protected].