Syndio
:sparkles: Syndi brings Syndio's pay equity expertise into Slack.:bar_chart: About Syndio
Syndio is the workplace equity platform. Companies use it to analyze pay across their workforce, understand and explain the gaps they find, and meet pay transparency and reporting requirements across jurisdictions. Syndi™ is the intelligence layer across that platform, and this app brings it into Slack.:dart: The problem it solves
The people who need an answer about pay equity are rarely the people who live in the analysis. A manager preparing an offer, an HR partner facing a new reporting rule, a comp analyst checking a definition: each has to find the right colleague, wait, and re-explain the context. Syndi answers where the question comes up, so work doesn't stall on a handoff.:zap: How it works in Slack
• Direct messages: message Syndi like a colleague. Answers stream in as they're written, and follow-ups stay in the same thread.
• Channel mentions: mention
• Files: attach a CSV, spreadsheet, PDF, or image and Syndi can read it, analyze the data in it, or build something new: a filtered view, a comparison, a cleaned file back.
• Sources: when an answer is grounded in source material, Syndi cites it. You can also ask "Where did that come from?" and it'll tell you.
• Suggested follow-ups: each answer offers next questions, one click away.
• Help anytime: send
Install Syndi, then ask it a question. It replies with a one-time link to connect your Slack identity to your Syndio account. The first connection in a workspace is made by an administrator of your organization, since that's what links the workspace to your organization.:no_entry_sign: What Syndi will not do
Syndi does not make or approve pay decisions, give legal advice, or determine whether your organization is compliant. It explains requirements and points you to the source material, but won't decide how a law applies to your situation. It also doesn't guess: if it can't answer reliably, it says so rather than inventing an answer.:lock: Privacy
Syndio does not use your data to train or fine-tune the models behind Syndi, and its model providers are contractually prohibited from training on data Syndio sends them. Your data is never shared with other customers.The Slack app stores no message content and no file contents, only the installation record, your account link, and your organization's settings. Attached files are scoped to your conversation, encrypted at rest, and analyzed in a private, temporary sandbox with no internet access. Syndi only answers with data you can already see.:warning: Before you install
• Syndi is included with your Syndio subscription. No separate charge for the Slack app.
• A paid Slack plan is required for the AI agent panel. Without one, Syndi still works, answering with standard Slack messages.
• Syndi uses a large language model and can generate inaccurate responses, summaries, or other output. Answers are advisory, cite their sources so they can be checked, and are not a substitute for your legal or compliance team's judgement.:email: Support
Email support@synd.io and we'll respond within two business days.
Syndio is the workplace equity platform. Companies use it to analyze pay across their workforce, understand and explain the gaps they find, and meet pay transparency and reporting requirements across jurisdictions. Syndi™ is the intelligence layer across that platform, and this app brings it into Slack.:dart: The problem it solves
The people who need an answer about pay equity are rarely the people who live in the analysis. A manager preparing an offer, an HR partner facing a new reporting rule, a comp analyst checking a definition: each has to find the right colleague, wait, and re-explain the context. Syndi answers where the question comes up, so work doesn't stall on a handoff.:zap: How it works in Slack
• Direct messages: message Syndi like a colleague. Answers stream in as they're written, and follow-ups stay in the same thread.
• Channel mentions: mention
@Syndi in a channel it's been added to and it replies in a thread, so the discussion stays where the work is.• Files: attach a CSV, spreadsheet, PDF, or image and Syndi can read it, analyze the data in it, or build something new: a filtered view, a comparison, a cleaned file back.
• Sources: when an answer is grounded in source material, Syndi cites it. You can also ask "Where did that come from?" and it'll tell you.
• Suggested follow-ups: each answer offers next questions, one click away.
• Help anytime: send
help for what Syndi can answer and how to reach support. Works before you connect an account.:rocket: Getting startedInstall Syndi, then ask it a question. It replies with a one-time link to connect your Slack identity to your Syndio account. The first connection in a workspace is made by an administrator of your organization, since that's what links the workspace to your organization.:no_entry_sign: What Syndi will not do
Syndi does not make or approve pay decisions, give legal advice, or determine whether your organization is compliant. It explains requirements and points you to the source material, but won't decide how a law applies to your situation. It also doesn't guess: if it can't answer reliably, it says so rather than inventing an answer.:lock: Privacy
Syndio does not use your data to train or fine-tune the models behind Syndi, and its model providers are contractually prohibited from training on data Syndio sends them. Your data is never shared with other customers.The Slack app stores no message content and no file contents, only the installation record, your account link, and your organization's settings. Attached files are scoped to your conversation, encrypted at rest, and analyzed in a private, temporary sandbox with no internet access. Syndi only answers with data you can already see.:warning: Before you install
• Syndi is included with your Syndio subscription. No separate charge for the Slack app.
• A paid Slack plan is required for the AI agent panel. Without one, Syndi still works, answering with standard Slack messages.
• Syndi uses a large language model and can generate inaccurate responses, summaries, or other output. Answers are advisory, cite their sources so they can be checked, and are not a substitute for your legal or compliance team's judgement.:email: Support
Email support@synd.io and we'll respond within two business days.
Syndio will be able to view:
Syndio will be able to do:
Review the details to better understand this app’s security practices. To learn more about assessing apps for your workspace visit our Help Center.
General
Developer
Syndio Solutions Inc.
Company headquarters location
United States
Terms of service
Privacy & data governance
Data retention policy
Syndio retains customer data for the life of the organization's subscription. When an organization is terminated, a scheduled worker clocks it from first sighting and hard-erases all data 90 days later. Individual users can erase their own conversations, memories, uploaded files and acknowledgements at any time on request.
Data archiving and removal policy
There is no archival tier. Deletion is a hard erase, not a soft delete. Three paths exist: user-initiated erasure of everything that user owns, the 90-day post-termination organization purge, and Slack uninstall, which immediately drops the workspace's OAuth and bot tokens, every Slack-to-Syndio identity link, and any outstanding connect tokens
Data storage policy
Customer data is stored in Google Cloud Platform, in the data region of the customer's Syndio organization, on managed Postgres with TLS in transit. The Slack app stores no Slack message content and no file contents. It stores workspace installation tokens, the workspace-to-organization mapping, Slack-user-to-Syndio-user identity links, short-lived single-use connect tokens, and event IDs for delivery de-duplication. Conversation content is held by a service in the same region, never by the Slack app.
Data hosting details
Cloud hosted. Containers on Google Kubernetes Engine with managed Cloud SQL Postgres, in separate US and EU projects with no cross-region data movement.
Data hosting company
Google Cloud Platform
App/service has sub-processors
yes
Guidelines for sub-processors
App/service uses large language models (LLM)
yes
LLM model(s) used
Anthropic Claude Opus 5 (claude-opus-5), served through Google Vertex AI.
LLM retention settings
Syndio stores conversation content in its own Postgres database, in the customer's data region. Users can erase everything they own on request, and a scheduled worker hard-erases all data for a terminated organization 90 days after termination.
LLM data tenancy policy
Syndi does not call Anthropic's public API. Claude runs as a managed Vertex AI service inside Syndio's own Google Cloud projects, authenticated with workload identity.
LLM data residency policy
The US deployment runs in Google Cloud's US region for storage.
Certifications & compliance
SOC attestation
ISO/IEC-27001 certification
CSA Star level
Privacy Shield notice
GDPR commitment
Data deletion request procedure
When someone requests deletion of personal data, they contact Syndio's privacy address, we verify the requester's identity before acting, and may ask for specific information to confirm it.
For Syndio, deletion is a hard erase, not a soft delete or an archive. Erasing a user's data removes every conversation that user owns and everything cascading from it, including stored memories, uploaded files and acknowledgements. Removing the Slack app from a workspace immediately deletes that workspace's stored OAuth and bot tokens, every Slack-to-Syndio identity link, and any outstanding connect tokens. When a customer organization terminates, a scheduled worker hard-erases all of that organization's Syndi data 90 days after termination.
We retain personal data only as long as reasonably necessary for the purposes it was collected for and to meet legal requirements.
HIPAA compliant
no
While this app may offer HIPAA compliance, Slack does not have a business associate agreement with any third-party application providers, including those in the Slack Marketplace, so you are responsible for validating the provider's compliance and executing an appropriate agreement before enabling.
Security
Date of latest pen test
2026-07-29
Executive summary is available to potential customers upon request
yes
Supports Single Sign On (SSO) with the following providers
Any SAML 2.0 identity provider, including Okta, OneLogin, Microsoft Entra ID and Google Workspace. Google OAuth also supported.
Supports Security Assertion Markup Language (SAML)
yes
Has a dedicated security team
yes
Contact for security issues
compliance@synd.io
Has a vulnerability disclosure program
yes
Vulnerability disclosure program URL
Vulnerability disclosure program covers Slack app
yes
Has a bug bounty program
yes
Bug bounty program URL
Requires third party authorization/connections
no
Uses token rotation
no