Send Reddit and community keyword alerts to Slack
Track keywords in Reddit posts and comments, Hacker News, forums, and the public web. Syften sends matching conversations to the Slack channels you choose, with enough context for your team to act.
- Choose one or more Slack channels
- Route filters by tag
- Read the excerpt before opening the source
- Send a test message during setup
We keep finding useful customer questions too late. What are you using to monitor Reddit and niche communities without drowning in noise?
What does the Syften app for Slack do?
It sends new Syften keyword matches into channels you choose. Each message includes the source, title or context, an excerpt, and a link to the original conversation.
The app is a non-interactive notifier. You create and refine filters in Syften; Slack is where the right team sees and acts on the result.
The actual conversation, not a mystery score
Read enough context to decide whether the post deserves a reply, handoff, research note, or no action.
Different filters can go to different channels
Use tags to separate sales signals, support issues, product feedback, brand mentions, and client work.
How to get Reddit keyword alerts in Slack
Create a Reddit keyword filter, connect your Slack workspace, and choose a channel for the matches. Here is a complete example tracking mentions of Supabase.
You need a Syften account with Slack delivery enabled. Standard and Pro include it; Entry does not. Compare plans and limits.
Create a Reddit keyword filter
In Setup → Communities, add this filter. Replace supabase with your product name or the keyword you want to follow:
site:reddit.com supabase $tag:redditChoose Save Filters. Put a multiword product name in double quotes so its words match together.
This watches Reddit posts and comments for the keyword. The $tag:reddit part labels the filter so you can route its matches to Slack; it does not narrow the search.
To watch only one subreddit, make the source more specific:
site:reddit.com/r/supabase/ supabase $tag:redditReview recent matches before relying on alerts. Add phrase exclusions to reduce the volume, then use an AI acceptance rule to filter the remaining noise when needed. Our common-word brand study shows that process with real results.
Connect your Slack workspace
Open Setup → Slack and choose Install Slack App. Select the workspace where alerts should arrive and authorize the Syften app.
If your workspace requires approval for apps, ask a Slack administrator to approve the installation. Return to Syften to choose the destination channel.
Install the app from Syften's Slack settings. Choose the channel and filter tag
Select a Slack channel, such as #reddit-mentions, and choose the reddit tag from your saved filter. Changes save automatically.
Choose all instead if you want that channel to receive matches from every filter, including other sources. Add another channel and tag to separate support, competitor, or client alerts.
For a private channel, add the Syften app through the channel's Integrations tab first. If a new channel is missing, use Can't see your channel? to refresh the list.
Choose a destination and use the Tag selector to control which filters reach it. Send a test message and watch for new matches
Choose Send test message beside the saved channel. Check Slack to confirm that Syften can post there.
The test checks delivery. Your keyword preview checks what the filter matches. New qualifying Reddit posts and comments then arrive automatically, with a link to the original conversation.
Open that link to read the thread and reply on Reddit. Syften's Slack app delivers alerts; replies are made in the original community.
#reddit-mentions Illustrative alertSyften APPBuilding a product with a shoestring budget. Here's how it's going.For now, I'm using FastAPI Cloud for the backend, Supabase for the database, and Vercel for the frontend.
site:reddit.com supabase $tag:reddit
post by UnemployedTechie2021
A real Reddit match for the example filter, shown in an illustrated Slack layout with a shortened excerpt.
Route the conversation by responsibility
A single mention channel can work for a founder. As the team grows, tagged filters keep urgent signals close to the person who can respond without copying every alert everywhere.
Buying intent to sales
Send recommendation requests, competitor alternatives, pricing discussions, and migration questions to a channel someone reviews while the thread is active.
Problems to support
Route bug reports, unresolved questions, documentation gaps, and product confusion to the team that can help publicly.
Feedback to product
Collect repeated use cases, feature requests, integration needs, and market language without mixing them into urgent sales alerts.
Clients to separate channels
Give each customer or campaign its own tag and destination so agency monitoring stays organized and reviewable.
Brand mentions to marketing
Put articles, community posts, social mentions, videos, podcast references, and public praise where the team can reuse or amplify them.
Known authors to the team
Track a founder, customer, partner, competitor, or advocate and route their public posts into a focused account-watch channel.
For the full support workflow, read how to use social media for customer service.
The Slack app has one narrow job
Syften uses Slack access to show available public and private channel names during setup and to post alerts into the channels you select. It does not request Slack channel-history permissions.
The filters, archive, and notification rules live in Syften. If someone writes to the app in Slack, it points them back to Syften setup because the app is intentionally non-interactive.
Read privacy and data-processing termsSelect destinations
See the workspace's available channels so you can choose where each alert workflow belongs.
Post keyword alerts
Deliver a matching source, excerpt, and link to the selected public or private channel.
No channel-history scope
Slack is the destination for Syften alerts, not a source for reading your workspace conversations.
Slack delivery works when the channel implies the next action
Syften is a strong fit when your team already works in Slack and wants useful public conversations to arrive beside sales, support, product, marketing, or client work—without asking everyone to monitor another inbox.
Operating since 2019
Check out what our customers are saying
At Rewardful, we're huge believers in word-of-mouth marketing. I've used most of the social monitoring tools on the market and most have a lot of noise in the results or miss important conversations happening online. Syften returns the most relevant social mentions with the least amount of noise out of all the tools I've tested so far. Their community listening is the best on the market and I love how you can fine tune by source.
I love that Syften monitors all the communities I am part of but don't have enough time to check all day. Now, I can check my email and see conversations happening on Twitter, Reddit, Indie Hackers, and many more places. It's incredibly useful. Worth every dollar.
We use Syften to react to people saying things about us on the internet every single day. It's a set once and forget tool that just helps your team keep your pulse on whatever it is you care about.
Syften is awesome. I use it for my business so I can monitor the brand, and participate in online discussions which can help us attract new customers. I also use it personally to keep track of niche subjects that I'm interested in like emerging tech and products.
We love Syften at PostHog and find it incredibly useful for listening to our open-source community. The Slack integration enables our entire team to find ways to connect with our users, whether it's the Marketing team sharing new content or the Engineering team answering technical questions. The filtering system is especially powerful and helps us separate the signal from the noise.
I've written a couple books and like to keep an eye on how and where folks are talking about them. Syften has helped me catch several key conversations that I otherwise wouldn't have seen. Even on the days without any notable alerts, I'm still happy to know that I haven't missed anything. A very useful tool.
Syften has become integral to our business. It allows us to monitor *and* respond in real-time using their super simple webhooks. For example, when people mention our competitors being expensive on Twitter, Syften finds it and enables us to respond instantly with Zapier. It's paid for itself many times over. It even helped us secure $5M in funding for one of our community members. Michael has been overwhelmingly supportive over the past 18+ months we've been a customer and we couldn't be more grateful.
I use Syften every day and have been for a year. I looked at various other social listening tools but they were mostly aimed at big brands and enterprise customers and carried a hefty price tag. Syften tracks all of the major networks that I'm interested (even ones the big tools don't) and it's affordable for businesses of every size. Every day I get an email digest of people talking about my product for me to take immediate action on.
I gather the mentions I get from Syften and add them to our customer sales and partner presentations to show how our product is gaining mindshare amongst users on Reddit and forums. These slides are very impactful.
Syften has been a great tool to understand in which communities my website is being mentioned, or topics relevant to my business. It allowed me to engage in meaningful discussions and to identify some important actors in my niche.
Syften has enabled us to keep an eye on the topics related to our product. We can easily track posts about discount codes, email marketing, and e-commerce. We can then suggest using our service, or just be helpful answering questions on subjects that we are familiar with.
Customer support
Support you can depend on
Providing exceptional customer support is our passion. We do everything in our power to ensure that every issue is resolved swiftly and thoroughly.
Talk to usFully AI Ready
Use the dashboard, or work with your AI assistant. Same mentions, your choice.
73 new matches: 45 Reddit, 21 X, 2 podcasts, and 5 low-value mentions.
I marked those 5 seen using your $syften-skill. Six Reddit threads look worth a reply.
The new feature is getting positive feedback. Two comments would make great testimonials.
Done. Six drafts in “To post”, assigned to Jeff, with source links and context. Ready for his review.
Done. Liked the 8 positive mentions using your connected X account.
All 68 remaining matches marked as read. You’re caught up.
Syften works with your own AI agent, using the model and instructions you trust. We provide the mentions and get out of the way.
Pricing
It pays for itself if you find just one customer (easy)
Entry
Keep an eye out for your product name
- Communities filters: 3A filter is a search query for mentions you want to track. Communities include Reddit, forums, Stack Exchange, podcasts, Hacker News, Indie Hackers, GitHub, Slack communities, mailing lists, and similar discussion spaces.
- Communities results: 100/day
- Web filters: 1The Web means public websites across the internet, including articles, changelogs, documentation, directories, product pages, and your competitors' blogs.
- Web results: 5/day
- Archive search: 7 daysSee who has mentioned you in the past. Click to read more.
- API accessQuery account matches and edit your filters. Archive API search requires Pro. Click to read more.
Standard
AI filtering, more filters, more archive, Slack integration, and optional Twitter and YouTube support
- Communities filters: 20A filter is a search query for mentions you want to track. Communities include Reddit, forums, Stack Exchange, podcasts, Hacker News, Indie Hackers, GitHub, Slack communities, mailing lists, and similar discussion spaces.
- Communities results: 200/day
- Web filters: 5The Web means public websites across the internet, including articles, changelogs, documentation, directories, product pages, and your competitors' blogs.
- Web results: 20/day
- Archive search: 30 daysSee who has mentioned you in the past. Click to read more.
- Slack integration
- X monitoring: +$40.00/monthPaid addon
- YouTube monitoring: +$20.00/monthPaid addon
- AI filteringFilter noisy matches before they reach your alerts. Click to read more.
- API accessQuery results and edit your settings. Click to read more.
Syften PRO
More matches, more filters, full archive history, MCP, and webhooks
- Communities filters: 100A filter is a search query for mentions you want to track. Communities include Reddit, forums, Stack Exchange, podcasts, Hacker News, Indie Hackers, GitHub, Slack communities, mailing lists, and similar discussion spaces.
- Communities results: 500/day
- Web filters: 20The Web means public websites across the internet, including articles, changelogs, documentation, directories, product pages, and your competitors' blogs.
- Web results: 50/day
- Archive search: full available historyHistory varies by source, with no plan-imposed time limit. API and MCP archive searches share 1,000,000 fetched items per calendar month. Click to read more.
- Slack integration
- X monitoring: +$40.00/monthPaid addon
- YouTube monitoring: +$20.00/monthPaid addon
- AI filteringFilter noisy matches before they reach your alerts. Click to read more.
- API accessQuery results and edit your settings. Click to read more.
- WebhooksPush new matches to your own endpoint. Click to read more.
- MCPConnect Syften to AI tools that support MCP. Click to read more.
Tailor made
We also offer custom solutions built just for you, whether it's integrating Syften into your product or supplying your marketing team with the right data.
Syften for Slack FAQ
What does the Syften app for Slack do?
It delivers Syften keyword alerts into Slack channels you choose. Each alert includes context from the matching public post, comment, page, video, podcast, or other monitored source and a link to the original.
Does the app monitor messages inside our Slack workspace?
No. This app is a delivery integration and does not request Slack channel-history permissions. Syften separately monitors a defined list of publicly available Slack communities; that is a different feature explained on the Slack community monitoring page.
Is the Syften Slack app interactive?
No. It is intentionally a non-interactive notifier. Configure filters, destinations, and monitoring settings in Syften, then use Slack to read and act on the alerts.
How do I install the app for Slack?
Create a Syften account, open Setup → Slack, choose Install Slack App, authorize the workspace, and select a destination channel. You can send a test message before relying on live alerts.
How do I connect Reddit to Slack?
Create a filter such as site:reddit.com supabase $tag:reddit, install the Syften Slack app, and map the reddit tag to your chosen channel. Follow the Reddit-to-Slack walkthrough for the complete setup.
Can I get Slack alerts for Reddit comments and specific subreddits?
Yes. Reddit filters cover both posts and comments. Add type:comment to watch only comments, or use site:reddit.com/r/supabase/ to restrict a filter to that subreddit. Keep your keyword in the filter to receive relevant matches.
Can different keyword alerts go to different Slack channels?
Yes. Add tags to Syften filters and map each tag to a Slack channel. For example, buying-intent filters can go to sales, problem reports to support, and each agency client to a separate channel.
Which Slack permissions does Syften request?
Syften requests permission to post messages and to list public and private channels so you can select alert destinations. It does not request channel-history permissions.
Can I send a test alert?
Yes. After selecting a channel in Syften Setup, use the Send test message action to verify that the app can post to the intended destination.
Which online sources can send alerts to Slack?
Slack delivery works with Syften results from the public web, Reddit, Hacker News, forums, GitHub, X/Twitter, YouTube, podcasts, Bluesky, supported public Slack communities, and other monitored sources available on your plan.
Do I need Zapier or a Reddit API key?
No. Syften monitors Reddit and delivers matching posts and comments through its own Slack integration. You do not need to build a Zap, configure a webhook, or provide a Reddit API key for this workflow.
Which plans include Reddit keyword alerts in Slack?
Slack delivery and AI filtering are included on Standard and Pro. Reddit monitoring is included on every plan, but Entry does not include Slack delivery. See the current plan comparison for filter and result limits.
Real-time community monitoring
One conversation can change what happens next
Be there when the right customer mentions your product, your competitor, or the problem you solve.