Communities for climate tech founders: 11 compared (2026)

The right community for a climate tech founder connects you with other founders on the same hard problems, and with the investors, corporates and experts who can help you deploy. Climate companies often need more capital and longer timelines than software, so the room matters. Below are 11 communities, from global Slacks to local meetups and hubs, each checked on its own pages on 28 October 2026.

A note before you read on: this guide is published by Remote Builders, our own free community for founders who build companies remotely, which you can join online from anywhere. It isn't in the table, because it isn't a climate community. We've left out any number we couldn't find on a community's own page.

How to choose a climate founder community

Global and online

• Work on Climate runs a global Slack where members build climate startups, find climate jobs and hire, with events, mentorship and expert office hours. It says it has 32k+ climate-focused professionals.
• 4WARD is free and says it has 20,000+ members across 90 cities and 100+ countries, with city hubs, WhatsApp groups and free monthly sector calls. Its Startup Tank pitch event is on 18 November 2026.
• Hack runs city chapter events for climate founders, funders and operators, a weekly newsletter and an annual summit.

Local meetups

London has two regular ones: Climate Tech Time, a monthly evening meetup with short talks run by Climate Connection, and Climate Coffee London, a free monthly morning coffee. In India, eChai runs climate startup meetups in cities such as Ahmedabad and Bengaluru. Climate Hero Club runs chapter events across Southeast Asia and the Middle East.

Hubs and national communities

ClimateHaven in New Haven is a non-profit hub with coworking, labs, an incubator and events, with hot desks at $195 a month (currency not named). Sustainable Ventures runs climate coworking in London and Manchester with a national Slack. Climate Salad is Australia's climate tech community, with a free profile and membership from $150 AUD + GST a year. Climate Collective supports climate tech startups in South Asia and the Global South and says it has 30,000+ members.

Communities for climate founders compared

These are 11 communities we checked on 28 October 2026. Every row had an event, post, intake or live join page dated May 2026 or later. "Says" means the figure is the community's own claim.

Notes on the table

• Upcoming events. Climate Coffee London meets on 29 October 2026, Hack's Zurich chapter on 11 November, Climate Hero Club's Abu Dhabi chapter on 19 November, and Climate Tech Time's winter edition on 25 November.
• Entry rules. Climate Salad approves company members to check they're working on a climate tech solution. ClimateHaven's incubator is for members only.
• Climate Collective onboards 200+ startups a year into its accelerator programmes, and its community has founders at the core.

Communities we checked and left out

We left out groups with nothing dated May 2026 or later, accelerators whose community is open only to their cohorts, groups that have rebranded away from founders, and sites that blocked us. We didn't find an African climate founder community that passed every check. If you run an active climate founder community, tell us and we'll check it.

Climate funding in numbers

The IEA's State of Energy Innovation 2026 says venture capital for energy technology start-ups fell for a third straight year in 2025, to USD 27 billion, while over 320 new energy start-ups raised their first funding. European start-ups took 25% of global energy venture capital in 2025, up from 15% five years earlier. With less money going round, the investor and corporate introductions a community provides count for more.

How to get value in your first month

1. Join one global group and one local one. Work on Climate or 4WARD for reach, and a meetup or hub in your city for depth.
2. Go to the same meetup three times. By the third, people know what you're building.
3. Bring one specific ask. "I need an intro to a corporate buyer of low-carbon cement" gets you somewhere.
4. Pitch when you're ready. 4WARD's Startup Tank and Hack's chapter pitches are built for that.
5. Add a broader founder group. Our comparison of communities for remote founders covers the general online options.

Common mistakes

• Joining job-seeker channels when you need founders. Climate communities mix both. Find the founder channels.
• Treating climate like software. Hardware and deployment take longer. Find founders on the same timeline.
• Skipping the local scene. Pilots and customers often come from your own city.
• Waiting for the perfect group. If nothing fits your city, start one. Our guide to starting a founder meetup covers the first three events.