Summer’s almost here. The ideas are flowing. Let’s build.
Slack Dev Day was a hit! If you missed it, don’t worry, you can watch the recording. We went deep on what it means to build on Slack in the age of AI agents, with a keynote and panelists sharing what’s coming next on the platform. 🚀
We also announced the Slack Agent Builder Challenge ($42K in prizes for builders who are ready to ship something great!). If you’ve got a project in progress or an idea you’ve been sitting on, this is your moment. 🏆
Let’s ride that summer momentum.
Here’s what’s new in June!
Is your app right for the Slack Marketplace?
Before you hit submit, read this. It covers the three things that matter most when submitting to the Slack Marketplace: external demand, multi-workspace support, and ongoing support readiness. Think of it as your pre-submission checklist.
Learn more →
The Slack Marketplace: All in One Place
We launched slack.dev/marketplace! It’s the new home for everything you need to get your app in front of Slack users everywhere. Whether you’re just starting to think about distribution or you’re ready to hit submit, this is where the journey begins.
From understanding the submission and review process to crafting a killer listing with images, video, and a sharp description, it’s all here. The blog posts walk you through what makes a great Marketplace app, what reviewers are looking for, and how to set your listing up for discovery. If you’ve built something great and you’re ready to take it from one workspace to every workspace, this is your starting point. 🚀
Want the bigger picture? Start with part one of a nine-part series: From One Workspace to Every Workspace: Introducing the Slack Marketplace.
More posts in the series are coming, so stay tuned. 🙌
Learn more →
The Shift from SSH to REST
How did Slack secure 700+ EMR data pipelines without breaking production? The data platform team moved from fragile SSH access to a stateless REST model using an internal gateway. Read the full breakdown of how we shrank our attack surface with zero downtime. ✅
Learn more →
Slack Agent Builder Challenge
We’re calling on all builders! From seasoned Slack veterans to first-time Slack CLI explorers, this is your chance to redefine the workplace by building intelligent agents that automate workflows, surface real-time insights, and connect systems.
Compete for a share of $42K in cash prizes, exclusive recognition, and more across three tracks:
- Best New Slack Agent
- Slack Agents for Good
- Slack Agents for Orgs
Build AI agents on the platform where work actually happens using Agent Builder, MCP integration, and the Real-Time Search API (with free developer sandboxes to get you started).
Deadline: July 13th | Winners announced August 11th.
Learn more and join the challenge!
In the Spotlight 🚀
- 🎧 Slack Dev Huddles — Episode 6 Live on LinkedIn!
The next Slack Dev Huddles episode is all about the Slack Marketplace — home to more than 2,600 apps and integrations. What is it? How do you get your app listed? Marcelo Hudson, Senior Manager of Product Management for the Slack Marketplace, is joining us to answer all of it!
📅 Next episode: June 23rd, 2026
Tune in to learn, build, and experiment:
Check Slack Devs on LinkedIn
- Block Kit just got more powerful
Big upgrades are live in Block Kit! We’ve introduced a powerful new block type: Data Tables, bringing filtering, sorting, and pagination to structured data inside your Slack apps and agents. To make experimenting even easier, the Block Kit Builder just got a major refresh, adding resizable panes, syntax highlighting, and improved error messaging with scroll-to-error so you can find and fix issues faster.
Try it in the Block Kit Builder or check out the docs.
We’re always blown away by what our community creates—and we want to highlight *you* next! Whether it’s a handy tool, a step-by-step guide, or an insightful article, if you’re proud of it, we want to hear all about it.
📬 Send us a message at technewsletter@slack-corp.com and share what you’ve been working on.
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