New
Announcing our $3.6m Seed Round

Build integrations like a modern SaaS company

The platform your engineers and customers will love for integrations with HRIS, ATS, LMS, CRM, & Marketing.
Add an Integration
Integrations
ADP Workforce Now
HRIS
Airship
Marketing
Ashby
ATS
Ashby
IAM
Attio
CRM
Autodesk
IAM
BambooHR
HRIS
Bitwarden
IAM
Braze
Marketing
Breathe
HRIS
Bullhorn
ATS
Bullhorn
CRM
Canva
IAM
CharlieHR
HRIS
Contentful
IAM
Domo
IAM
Dropbox
IAM
Duo
IAM
Egnyte
IAM
Employment Hero
HRIS
Freshsales
IAM
Freshteam
HRIS
Greenhouse
ATS
Greenhouse
IAM
Gusto
HRIS
HR Cloud
HRIS
HaileyHR
HRIS
Hibob
HRIS
HubSpot Marketing
Marketing
Hubspot CRM
CRM
Humaans
HRIS
JazzHR
ATS
JetBrains
IAM
Klaviyo
Marketing
Klaviyo
IAM
LastPass
IAM
Leapsome
IAM
Lever
ATS
Lever
IAM
LogicMelon
ATS
Microsoft Dynamics 365
CRM
Netlify
IAM
Oracle HCM
HRIS
Oracle HCM
IAM
Personio
HRIS
Pinpoint
ATS
Pinpoint
IAM
Pipedrive
CRM
Recruitee
ATS
Render
IAM
Rollbar
IAM
SAP SuccessFactors
ATS
SAP SuccessFactors
HRIS
SAP SucessFactors
LMS
Sage HR
HRIS
Salesforce
CRM
Salesloft
IAM
Scaleway
IAM
SmartRecruiters
ATS
SmartRecruiters
IAM
Tableau
IAM
TalentLMS
LMS
TeamTailor
ATS
TeamTailor
IAM
Terraform
IAM
UKG Pro
HRIS
UKG Ready
HRIS
Vibes
Marketing
WebEx
IAM
Workable
ATS
Workable
IAM
Workday
ATS
Workday
HRIS
Workday
LMS
Zelt
HRIS
Zelt
IAM
Zoho CRM
CRM
See all integrations
Integrations
ADP Workforce Now
HRIS
BambooHR
HRIS
Breathe
HRIS
CharlieHR
HRIS
Employment Hero
HRIS
Freshteam
HRIS
Gusto
HRIS
HR Cloud
HRIS
HaileyHR
HRIS
Hibob
HRIS
Humaans
HRIS
Oracle HCM
HRIS
Personio
HRIS
SAP SuccessFactors
HRIS
Sage HR
HRIS
UKG Pro
HRIS
UKG Ready
HRIS
Workday
HRIS
Zelt
HRIS
See all integrations
Integrations
Ashby
ATS
Bullhorn
ATS
Greenhouse
ATS
JazzHR
ATS
Lever
ATS
LogicMelon
ATS
Pinpoint
ATS
Recruitee
ATS
SAP SuccessFactors
ATS
SmartRecruiters
ATS
TeamTailor
ATS
Workable
ATS
Workday
ATS
See all integrations
Integrations
SAP SucessFactors
LMS
TalentLMS
LMS
Workday
LMS
See all integrations
Integrations
Ashby
IAM
Autodesk
IAM
Bitwarden
IAM
Canva
IAM
Contentful
IAM
Domo
IAM
Dropbox
IAM
Duo
IAM
Egnyte
IAM
Freshsales
IAM
Greenhouse
IAM
JetBrains
IAM
Klaviyo
IAM
LastPass
IAM
Leapsome
IAM
Lever
IAM
Netlify
IAM
Oracle HCM
IAM
Pinpoint
IAM
Render
IAM
Rollbar
IAM
Salesloft
IAM
Scaleway
IAM
SmartRecruiters
IAM
Tableau
IAM
TeamTailor
IAM
Terraform
IAM
WebEx
IAM
Workable
IAM
Zelt
IAM
See all integrations
Integrations
Attio
CRM
Bullhorn
CRM
Hubspot CRM
CRM
Microsoft Dynamics 365
CRM
Pipedrive
CRM
Salesforce
CRM
Zoho CRM
CRM
See all integrations
Integrations
Airship
Marketing
Braze
Marketing
HubSpot Marketing
Marketing
Klaviyo
Marketing
Vibes
Marketing
See all integrations
Terms
Privacy
Backed by exceptional founders & investors at:
Unified APIs

We {standardize} APIs so you don’t have to.

      Integrate with an entire industry at once. Our pre-mapped Unified APIs plug your app to entire categories of tools your customers use.
      Expand your integrations. New connectors take 1 click to enable as they come pre-mapped to our Unified APIs.
      Launch. Fast. StackOne includes all you need to build, test, ship, and monitor your integrations.
Unified APIs

We standardize APIs so you don’t have to

Save Resources
Integrate with an entire industry at once
Our pre-mapped Unified APIs plug your app into entire categories of tools your customers use.
ATS
+10
+7
+25
+9
ATS
CRM
HRIS
MKT
Your SaaS
Expand Product
Expand your integrations
New connectors take 1 click to enable as they come pre-mapped to our Unified APIs.
Bullhorn
New
HubSpot
Pinpoint
Airship
New
Expand Product
Launch. Fast.
StackOne includes all you need to build, test, ship, and monitor your integrations.
Dozens of integrations in hours
Add dozens of integrations at once to your product.
Constantly add new Integrations
Add new integrations in 1 click to your product.
Solve all your integration problems
Leverage pre-built components to make integrations a breeze.
“I wish this had existed 5 years ago when I built Screenloop”
Romain Sestier
|
Founder, Screenloop
Why StackOne

The Enterprise-Ready Integration Platform

All the tools you need to build real-time integrations, at scale, with best-in-class security & privacy.
REAL-TIME

Read and Write in real time

StackOne translates your API calls directly to your customers’ tools. No sync delays.
Book Demo
PRIVATE & SECURE

Keep customer data safe

Unlike other platforms, we never store your customers’ PII, and can process it in any region.
Book Demo
CUSTOMIZABLE

Customize for any use-case

StackOne lets you create your own unified fields, and handle any of your customers' set-up.
Book Demo
Why StackOne

Enterprise-Ready Integration Platform

All the tools you need to build real-time integrations, at scale, with best-in-class security & privacy.
Read and Write in real time
StackOne translates your API calls directly to your customers’ tools. No sync delays.
Stay in control of your customers’ data
Unlike other platforms, we never store your customers’ PII, and can process it in any region.
Private & Secure
Read and Write in real time
StackOne translates your API calls directly to your customers’ tools. No sync delays.
Stay in control of your customers’ data
Unlike other platforms, we never store your customers’ PII, and can process it in any region.
Customize for any use-case
StackOne lets you create your own unified fields, and handle any of your customers' set-up.
Read and Write in real time
StackOne translates your API calls directly to your customers’ tools. No sync delays.
Stay in control of your customers’ data
Unlike other platforms, we never store your customers’ PII, and can process it in any region.
Handle even the most complex integrations
Use pre-built infrastructure to customize connectors and custom field mappings.
Real-Time
Read and Write in real time.
StackOne translates your API calls directly to your customers’ tools.
Private & Secure
Stay in control of your customers’ data.
Unlike other integration platforms, StackOne never stores your customers’ PII, and can process it in any region.
Customizable
Handle even the most complex integrations.
Use pre-built infrastructure to customize connectors and customer field mappings easily.
Our Customers

Product teams love building with StackOne

Rated 5/5 Stars
StackOne is a game-changer – we launched 6 enterprise HRIS integrations in a few weeks. It is the only platform we tested that enabled us to customize the unified API to fit our use-case across so many integrations. And the real-time API makes reading and writing much easier than other tools that have a sync delay.
Anthony Petane
|
Director of Product, Localyze
StackOne has made launching new integrations much faster, and it only took a few days to implement. The documentation and support are amazing, and I’m impressed by how quickly the team are building new features!
Klaus Julin
|
CTO, Introist
The experience with StackOne has been phenomenal. The product is easy to use for our technical team, the support is world-class and the team is incredibly responsive to our growing needs. I’m delighted that we bet on them for such a critical part of our infrastructure.
Sam Dhesi
|
CEO, Popp
StackOne has become a crucial part of our integration strategy. We wanted to augment our existing optimization integrations with a new hub that gives us broader reach and puts us at the core of our enterprise customers' content workflows without the pain of building them all in-house.
Jasper Pye
|
CTO, Phrasee
Rated 5/5 Stars
Our Users

Product teams love building with StackOne

Rated 5/5 Stars
StackOne is a game-changer – we launched 6 enterprise HRIS integrations in a few weeks. It is the only platform we tested that enabled us to customize the unified API to fit our use-case across so many integrations. And the real-time API makes reading and writing much easier than other tools that have a sync delay.
Anthony Petane
|
Director of Product, Localyze
StackOne has made launching new integrations much faster, and it only took a few days to implement. The documentation and support are amazing, and I’m impressed by how quickly the team are building new features!
Klaus Julin
|
CTO, Introist
StackOne powers the majority of Screenloop’s ATS integrations. It’s the best platform to support reading and writing a high number of data points across a lot of integrations. Our time to release a new integration dropped significantly and there is no data stored on their end. And the support is awesome!
Rodrigo Santos
|
CTO, Screenloop
The experience with StackOne has been phenomenal. The product is easy to use for our technical team, the support is world-class and the team is incredibly responsive to our growing needs. I’m delighted that we bet on them for such a critical part of our infrastructure.
Sam Dhesi
|
CEO, Popp
StackOne has become a crucial part of our integration strategy. We wanted to augment our existing optimization integrations with a new hub that gives us broader reach and puts us at the core of our enterprise customers' content workflows without the pain of building them all in-house.
Jasper Pye
|
CTO, Phrasee
We’ve seen major improvements in data quality since we migrated to StackOne from another integration platform that was not real time (since StackOne always reads from the source of truth). The transition was super easy thanks to the support from the StackOne team!
Alex Santos
|
CTO, Reachdesk
Rated 5/5 Stars
The Platform

Why learn to speak every API’s language?

StackOne translates API calls in real-time via pre-mapped unified APIs so you only have to build once to integrate with entire category of tools.
The Platform

Why learn to speak every API’s language?

StackOne translates API calls in real-time via pre-mapped unified APIs so you only have to build once to integrate with entire category of tools.
What’s included

StackOne comes pre-loaded with...

70+ Integrations and counting
Unlimited API Calls to providers
30+ Data Models to interact with
4,000+ API fields pre-mapped
40+ Sandbox Accounts to access
What’s included

StackOne comes pre-loaded with...

StackOne automatically translates your API calls via pre-mapped.
50+ integrations and counting
Unlimited API Calls to providers
30+ Data Models to interact with
3,000+ API fields pre-mapped
40+ Sandbox Accounts to access
What’s included

StackOne comes pre-loaded with...

50+ Integrations and counting
Unlimited API Calls to providers
30+ Data Models to interact with
3,000+ API fields pre-mapped
40+ Sandbox Accounts to access
What’s included

StackOne comes pre-loaded with...

StackOne automatically translates your API calls via pre-mapped.
50+ integrations and counting
Unlimited API Calls to providers
30+ Data Models to interact with
3,000+ API fields pre-mapped
40+ Sandbox Accounts to access
Integrations

70+ Integrations

Add an Integration
Integrations
ADP Workforce Now
HRIS
Airship
Marketing
Ashby
ATS
Ashby
IAM
Attio
CRM
Autodesk
IAM
BambooHR
HRIS
Bitwarden
IAM
Braze
Marketing
Breathe
HRIS
Bullhorn
ATS
Bullhorn
CRM
Canva
IAM
CharlieHR
HRIS
Contentful
IAM
Domo
IAM
Dropbox
IAM
Duo
IAM
Egnyte
IAM
Employment Hero
HRIS
Freshsales
IAM
Freshteam
HRIS
Greenhouse
ATS
Greenhouse
IAM
Gusto
HRIS
HR Cloud
HRIS
HaileyHR
HRIS
Hibob
HRIS
HubSpot Marketing
Marketing
Hubspot CRM
CRM
Humaans
HRIS
JazzHR
ATS
JetBrains
IAM
Klaviyo
Marketing
Klaviyo
IAM
LastPass
IAM
Leapsome
IAM
Lever
ATS
Lever
IAM
LogicMelon
ATS
Microsoft Dynamics 365
CRM
Netlify
IAM
Oracle HCM
HRIS
Oracle HCM
IAM
Personio
HRIS
Pinpoint
ATS
Pinpoint
IAM
Pipedrive
CRM
Recruitee
ATS
Render
IAM
Rollbar
IAM
SAP SuccessFactors
ATS
SAP SuccessFactors
HRIS
SAP SucessFactors
LMS
Sage HR
HRIS
Salesforce
CRM
Salesloft
IAM
Scaleway
IAM
SmartRecruiters
ATS
SmartRecruiters
IAM
Tableau
IAM
TalentLMS
LMS
TeamTailor
ATS
TeamTailor
IAM
Terraform
IAM
UKG Pro
HRIS
UKG Ready
HRIS
Vibes
Marketing
WebEx
IAM
Workable
ATS
Workable
IAM
Workday
ATS
Workday
HRIS
Workday
LMS
Zelt
HRIS
Zelt
IAM
Zoho CRM
CRM
See all integrations
Integrations
ADP Workforce Now
HRIS
BambooHR
HRIS
Breathe
HRIS
CharlieHR
HRIS
Employment Hero
HRIS
Freshteam
HRIS
Gusto
HRIS
HR Cloud
HRIS
HaileyHR
HRIS
Hibob
HRIS
Humaans
HRIS
Oracle HCM
HRIS
Personio
HRIS
SAP SuccessFactors
HRIS
Sage HR
HRIS
UKG Pro
HRIS
UKG Ready
HRIS
Workday
HRIS
Zelt
HRIS
See all integrations
Integrations
Ashby
ATS
Bullhorn
ATS
Greenhouse
ATS
JazzHR
ATS
Lever
ATS
LogicMelon
ATS
Pinpoint
ATS
Recruitee
ATS
SAP SuccessFactors
ATS
SmartRecruiters
ATS
TeamTailor
ATS
Workable
ATS
Workday
ATS
See all integrations
Integrations
SAP SucessFactors
LMS
TalentLMS
LMS
Workday
LMS
See all integrations
Integrations
Ashby
IAM
Autodesk
IAM
Bitwarden
IAM
Canva
IAM
Contentful
IAM
Domo
IAM
Dropbox
IAM
Duo
IAM
Egnyte
IAM
Freshsales
IAM
Greenhouse
IAM
JetBrains
IAM
Klaviyo
IAM
LastPass
IAM
Leapsome
IAM
Lever
IAM
Netlify
IAM
Oracle HCM
IAM
Pinpoint
IAM
Render
IAM
Rollbar
IAM
Salesloft
IAM
Scaleway
IAM
SmartRecruiters
IAM
Tableau
IAM
TeamTailor
IAM
Terraform
IAM
WebEx
IAM
Workable
IAM
Zelt
IAM
See all integrations
Integrations
Attio
CRM
Bullhorn
CRM
Hubspot CRM
CRM
Microsoft Dynamics 365
CRM
Pipedrive
CRM
Salesforce
CRM
Zoho CRM
CRM
See all integrations
Integrations
Airship
Marketing
Braze
Marketing
HubSpot Marketing
Marketing
Klaviyo
Marketing
Vibes
Marketing
See all integrations
Terms
Privacy
Explore all integrations ->
What's Included

All the tools you need to build real-time integrations, at scale.

Book Demo
      Easily Create New Candidates. Lorem ipsum dolor sit amet  adipiscing elit.
      Connect with any ATS. Even the hard ones ipsum dolor sit amet  adipiscing elit.
      Sandbox access. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
      Real-Time. You can poll the API very frequently consectetur adipiscing elit.
      Bypass or Fast-Track Partnerships. Most integrations don’t require an official.
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Security & Privacy

Certified, Secure, Private.

StackOne is privacy-first. It's the only embedded integration platform that never stores your customers' data by default.
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Latest Research

The knowledge hub for Unified APIs & Integration Expertise. Subscribe for new integration resources & product updates.
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Security & Privacy

Certified, Secure, Private.

StackOne is privacy-first. It's the only embedded integration platform that never stores your customers' data by default.
SOC 2
Certified
CCPA
Compliant
GDPR
Compliant
HIPAA
Compliant
Join StackOne

Start saying yes to your customers

All the tools you need to build real-time integrations, at scale, with best-in-class security & privacy.
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