Join the members of the London tech & startup scene, including Accelerators (Techstars, 500 startups, Seedcamp, Mass Challenge), Coworking spaces (Wework, Rainmaking Loft, Tech Hub) and people from all across the startup community (Gocardless, Skimlinks, Moo, Stripe, Tesla, Bebo, Spotify, General Assembly, 3beards)... the list goes on!!

CROtricks is Conversion Rate Optimization Experts Community on Slack. When working with CRO you might develop some cool tricks to improve your efforts, that would be a great benefit for other CRO practitioners to discuss in one centralized place also as share the best practices to develop it further.

Financial discussion slack group. This includes Fintech, HFT, Stocks and Bonds, Personal Finance, Etc...

Community of Node.js and .NET developers who utilize Edge.js to interop between the two within a single process on Windows, OSX, and Linux.

Growing community of tvOS developers building Apple TV apps.

Slack community for Slack moderators. If you run or mod a Slack community join us.

mysalespitch.rocks is a Slack Community for sales professionals to connect with recruiters or hiring managers while learning best practices to apply towards their existing position or their next gig.

Discuss the latest in FinTech!

Building a better future together. Work on open source for social good.

Slack community for Machine Learning

Chat for the PHP community in Scotland. People are also meeting physically once a month in Aberdeen, Dundee, Edinburgh and Glasgow.

Coinality connects employers & entrepreneurs with freelancers who want to work for bitcoin.

Join our Hack Productivity-only Slack channel. You can use this channel to not only talk in real time with other participants (and maybe find a teammate), and also to ask questions of the competition managers. Just make sure to be respectful – we all have the same goal (building cool stuff).

Electronics For All (An Open Community), For People around the world, who are interested in Embedded Systems (8051, AVR, PIC, ARM, etc,.),  Embedded OS (Android, Tizen, Brillo, mBED, Ubuntu, Windows IoT core, etc,.),  Electronics (Schematics, Simulation, PCB, etc,.),  Industrial Automation (PLC, CNC, SCADA, HMI,etc,.), Robotics (Industrial, Rovers, DoF, etc,.), Open-Hardware (Arduino, Raspberry PI, Digistump, Trinket), Open-Source Software, Tool, Framework and Platform, Beacons (PhysicalWeb, iBeacon, Eddystone,etc,.), 3D printing,  Professional networking, knowledge sharing and discussions on these technologies and engineering as well as emerging technologies.

Meet other people in the Munich startup scene.

join us on the Slack if you are working with eZ and have some questions or comments.

Tasked with building an API for your company but don't have a clue where to start? Taken over an existing API and hate it? Come and get help, talk with other API developers, share horror stories or show off.

Join commercial drone industry experts speaking regarding topics including: regulations, news, aerial media, surveying, inspection, construction, mining, real estate, etc. If you are curious about making money with drones, this is the group for you.

A microservices ecosystem. Simplifying building and managing distributed systems.

Join 10,000+ UX designers and researchers from around the world to discuss user experience.

PostgreSQL Slack channel.

Our Slack community is for people who not only love the world of Megaman Battle Network, but want to work on making it a reality.

The way for Amsterdam's tech people to connect.

Are you a developer in Metro Vancouver? Want to chat with other local developers? Come join the Vancouver Developers Slack.

All countries in the world have their own unique advantages and characteristics. Starting a business in each of these places requires exceptional courage and persistence. The lists presented by the Founded X community are a tribute to all innovative startups worldwide that are proud of their local roots. We'd like to encourage anyone to participate in the community and join our global Slack Community or start a locally curated list in a country that is currently underexposed.

Parse Open Source Community

We are a free online community for any open source, space-based projects. Through many different channels of this community users can grow their ideas with like minded developers, scientists, students, geeks, hackers, techies, and anyone on the forefront of technology breakthroughs.

Join the Paris Data Engineers slack communities

PRO - The Producers and Remixers Organization, is dedicated to bringing worthwhile music production knowledge to the electronic music scene, as well as building a community of musicians that can work and grow together. We welcome people from all backgrounds and pursuits, including singers, songwriters, classical musicians, and everything in-between. Our Slack community has channels for discussing specific topics like mixing, mastering or sound design, as well as location-specific channels for connecting with producers near you.

The world's first Slack community for Mac developers.

Introductory group to Project or Product Management discussions.

WorthingDigital is a community of locals from various backgrounds with a common interest in all things, digital, media and online.

Crypto-platform for asset/custom token issuance, transfer and trading on blockchain.

Tokyo Tech community.

A community for emerging technologies

The channel is discussion, troubleshooting and development for Android, Windows Phone, WebOS, Ubuntu Touch, Firefox OS and Tizen phones. slack invites: https://xda-developers.herokuapp.com/ https://xdadev.herokuapp.com/

Official Slack for ISACA@UNCC

CYMPLAR talk is a channel to share experience mentoring and talk about Startups in Australia, from noobies to experts all invited to chat, post blog link and generate collaboration and ideas to grow

The NI Tech & Design slack community is a gathering of software developers and designers based in, or with connections, to Northern Ireland, UK.

Slack community for distributed system

A place where to talk about Akeneo PIM and related tools, the Product Information Manager based on Symfony2 and OroPlatform.

Friendly game industry channel focused on Q&A, feedback, networking, and promotion. We offer help with Unity, Game Maker, XNA, Unreal, and just about anything else game dev related. In addition we have expertise in game design surrounding story writing, narrative, sound, and many other topics.

Slack for makers

A Slack chat designed for you to discuss WordPress, business and everything in between.

The #techbelgium community grew out of a collective desire to facilitate communication between the tech communities in Belgium. This is a Slack community of tech-minded people where we can all talk, share experiences and ask and/or answer questions.

A slack chat group for digital nomads. Join our slack community and connect with fellow digital nomads. Explore new places around you by connecting with other digital nomads in your city.

A group for gamers to talk about gaming, tech and anything related. All platforms welcome but please expect some proper banter!

Marketers Chat is a community for Affiliate Marketers. We have members from all backgrounds, Social Media Marketing, CPA, PPC, PPV, SEO, Mobile Marketing and others. Members like Network Owners, Affiliates, Bloggers, Advertisers, Media Buyers.