OutboundSync is now in the Attio App Store

OutboundSync is now listed in the Attio App Store — Attio’s public directory for teams that want outbound activity from their sales engagement stack logged on the right Attio person and company records. Gold-tier platforms Instantly, Smartlead, EmailBison, and HeyReach lead the Attio beta, along with more sequencers and orchestration tools.

Find OutboundSync in the Attio App Store

See the Attio integration page for current beta scope and supported platforms.

Why Attio is built for flexible GTM data

Attio was not built as a generic CRM bolt-on. Nicolas Sharp and Alexander Christie co-founded the company in London in 2019 after pivoting from Fundstack — a vertical CRM for venture capital they had built since 2017. They wanted a customizable data model GTM teams could shape to their motion, not a simplified CRM template — a thesis Sharp put in writing when Attio raised $23.5M in Series A funding led by Redpoint Ventures.

That goal still shows up in the product: flexible objects, lists, views, and workflows in an AI-native CRM for startups and GTM builders. OutboundSync carries the same idea into the outbound stack — activity from Smartlead, Instantly, HeyReach, and the rest lands as structured notes where reps already work.

What the Attio App Store requires

Attio’s App Store is not a free-for-all listing. Public integrations connect through OAuth 2.0, not pasted API keys.

Per Attio’s OAuth tutorial and App Store publishing guide:

• Developers enable OAuth 2.0 in the Attio developer dashboard and configure redirect URIs and scopes
• Users authorize through Attio’s consent flow at app.attio.com/authorize and can pick which workspace to grant access
• Access is revocable under workspace settings → Apps
• Published apps are reviewed for listing content, code, and design assets before they appear in the public App Store; Attio targets completing reviews within one week

OutboundSync is a reviewed public OAuth app, so Attio admins can install, audit, and revoke access without sharing secrets.

What OutboundSync does for Attio teams

OutboundSync logs one-way outbound email and social activity onto Attio person and company records as structured notes during the current beta. Reps review synced activity inside the lists and views they build in Attio — OutboundSync does not ship prebuilt lists or views.

The Attio beta is intentionally lighter than HubSpot and Salesforce: one-way only, less configurability, and guided onboarding with the OutboundSync team. Phone activity is not supported in this rollout.

For setup mechanics and onboarding expectations, see the Attio CRM beta announcement.

How do Instantly, Smartlead, EmailBison, and HeyReach connect to Attio?

OutboundSync receives webhook events from each platform, matches the prospect to an Attio person, and logs outbound activity as notes on that record and the related company. Email platforms capture sends, replies, opens, and campaign context. Social platforms capture connection requests, messages, and profile views.

These four are OutboundSync gold-tier integrations — the deepest product support we offer on HubSpot and Salesforce today. Attio beta is one-way, but they are the primary entry points for teams evaluating an outbound-to-Attio path.

Platform	Channel focus	Integration page
Instantly	Email	Instantly + Attio
Smartlead	Email	Smartlead + Attio
EmailBison	Email	EmailBison + Attio
HeyReach	Social	HeyReach + Attio

Full Attio beta platform coverage

Beyond gold tier, the Attio beta supports 18 direct integrations:

Smartlead, Instantly, Clay, EmailBison, Brevo, Reply.io, Lemlist, Aimfox, Drippi, HeyReach, Mixmax, SalesRobot, Salesforge, GetSales, Ken AI, SuperSend, HotHawk, and Master Inbox.

Lemlist and Aimfox connect directly — a step up from the earlier Master Inbox-only path. Lemlist covers email and social; Aimfox covers social outreach.

Via Master Inbox only: Expandi, Salesflow, PlusVibe, and Ashby.

Salesfinity is not in this rollout — call activity does not map cleanly to Attio’s email and note activity model in the current beta.

Other noteworthy apps in Attio’s App Store

Attio’s App Store includes serious revenue-stack neighbors alongside OutboundSync. Each solves a different job:

• Mixmax — pushes Attio contacts into Mixmax email sequences via workflows; enrollment from CRM, not activity logging back
• Outreach — native sequence enrollment from Attio record pages and workflows
• Clay — enrichment and orchestration on Attio records; OutboundSync also syncs Clay sequencer activity into Attio
• Hightouch / Census — reverse-ETL and warehouse sync for data infrastructure teams
• Zapier — general automations across the stack

Mixmax and Outreach launch outbound sequences from Attio. OutboundSync logs sequencer activity back onto records. Hightouch and Census move warehouse data. Clay enriches and orchestrates. That mix is why the App Store matters for full-funnel revenue teams running on flexible CRM data.

Attio partners in our network

Outbound activity lands in Attio through OutboundSync. Agencies build the GTM system on top — pipelines, lists, workflows, and dashboards that turn synced activity into booked meetings and revenue.

TAM to Target is a Gold partner for teams selling into K-12, government, and public sector — markets where phone-first SDR execution and the CRM infrastructure around it have to work as one system.

Also in our network: The Deal Lab, where founder Kellen Casebeer is an Attio Expert, for outbound lead gen, GTM strategy, and sales ops across email, social, and phone; and HealthTech2Care for outbound pipeline in healthtech and life sciences.

How to get started

1. Find OutboundSync in the Attio App Store
2. Install and authorize the OAuth connection
3. Book a demo for guided beta onboarding
4. Read the Attio CRM beta guide