Discover similar websites from a Slack reaction
A deliberate reaction on a research message can start a BuiltWith lookup for websites with a similar technology profile.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Recommendations API Lookup
Tool to generate a list of websites with similar technology profiles. use when you need technology recommendations for a given domain lookup.
Why this helps
Follow-up discovery is easy to drop when the next research step depends on someone noticing an old request.
- Use a visible Slack signal to begin the next research step.
- Discover sites with technology profiles similar to a known domain.
- Reduce repeated searching for the same request.
Setup
Build it in a few focused steps.
- 1Connect Slack and BuiltWith to Notis once through the portal.
- 2Create an automation in the portal or ask Notis conversationally, in plain language.
- 3Tell Notis in one instruction to use Recommendations API Lookup for a confirmed domain in a message when the agreed research reaction is added.
- 4Select the Slack message-reaction-added trigger, choose a channel for run reports, and test with one real domain.
Questions about this workflow
Does the reaction identify the domain?
The instruction should have Notis read the message and confirm the root domain before requesting recommendations.
Are the results guaranteed competitors?
No. BuiltWith returns websites with similar technology profiles, which can be useful candidates for further research.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Builtwith. A trigger fires from one place; an action lands in another.
Slack triggers
Builtwith actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Create Domain List File
Tool to create a txt or zip file from a list of domains. use when preparing a domain list for bulk or firehose lookups.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Datasets Lookup
Tool to access mass internet technology usage information from 2000 to today. use when you need historical technology usage trends for a domain.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Domain API Lookup
Tool to retrieve current and historical technology information of a website. use after confirming the domain to lookup.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Financial API Lookup
Tool to fetch financial data for a domain. use when you need company financials for us or uk registered websites.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Free API Lookup
Tool to access last updated dates and counts for technology groups and categories for websites. use when you need a snapshot of technology usage timing for a domain.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Lists API Get List With Meta
Tool to retrieve a list of websites using a specified technology, including metadata. use when you need detailed company and site information for sites using a particular technology.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Lists API Get List
Tool to retrieve a list of websites using a specific technology. use when you want to find sites leveraging a particular tech.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
MCP API Lookup
Tool to query live web technologies for a root domain. use after confirming a valid domain name.
Connect any two apps with Notis in the middle.
Slack and Builtwith, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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