Seamless integration to get content and data where you need it.

Letterhead integrates with 30+ products for content, audience data, sending, and more. Don't see yours? Let us know, and we'll build it.

ESP & sending

[Mailchimp](/content/integrations/mailchimp "Mailchimp"/index.html)
[Constant Contact](/content/integrations/constant-contact "Constant Contact"/index.html)
[Iterable](/content/integrations/iterable "Iterable"/index.html)
[Braze](/content/integrations/braze "Braze"/index.html)
[Cordial](/content/integrations/cordial "Cordial"/index.html)
[Listrak](/content/integrations/listrak "Listrak"/index.html)
[Adestra](/content/integrations/adestra "Adestra"/index.html)
[Adobe Campaign](/content/integrations/adobe-campaign "Adobe Campaign"/index.html)
Sailthru
Salesforce Marketing Cloud
Klaviyo
Marketo
Sparkpost
ActiveCampaign

CRM, CDP & data

[HubSpot](/content/integrations/hubspot "HubSpot"/index.html)
[Salesforce](/content/integrations/salesforce "Salesforce"/index.html)
[BlueConic](/content/integrations/blueconic "BlueConic"/index.html)
[Piano](/content/integrations/piano "Piano"/index.html)
Segment
Snowflake
BigQuery
Mixpanel

Forms & lead capture

[Typeform](/content/integrations/typeform "Typeform"/index.html)
[OptinMonster](/content/integrations/optinmonster "OptinMonster"/index.html)
[Leadpages](/content/integrations/leadpages "Leadpages"/index.html)
[Unbounce](/content/integrations/unbounce "Unbounce"/index.html)
[Instapage](/content/integrations/instapage "Instapage"/index.html)
[Facebook Lead Ads](/content/integrations/facebook-lead-ads "Facebook Lead Ads"/index.html)

Content & CMS

[WordPress](/content/integrations/wordpress "WordPress"/index.html)
[Sanity](/content/integrations/sanity "Sanity"/index.html)
[CUE](/content/integrations/cue "CUE"/index.html)
[BLOX](/content/integrations/blox "BLOX"/index.html)
[Zephyr](/content/integrations/zephyr "Zephyr"/index.html)
Arc XP
Brightspot
Contentful
Ghost
RSS feeds
Google Docs

Curation & reading

[Feedly](/content/integrations/feedly "Feedly"/index.html)
[Pocket](/content/integrations/pocket "Pocket"/index.html)
[Instapaper](/content/integrations/instapaper "Instapaper"/index.html)

Events & commerce

[CitySpark](/content/integrations/cityspark "CitySpark"/index.html)
[Evvnt](/content/integrations/evvnt "Evvnt"/index.html)
[Shopify](/content/integrations/shopify "Shopify"/index.html)
Stripe
[Eventbrite](/content/integrations/eventbrite "Eventbrite"/index.html)
[Calendly](/content/integrations/calendly "Calendly"/index.html)
[Zoom](/content/integrations/zoom "Zoom"/index.html)

Ad & monetization

[LiveIntent](/content/integrations/liveintent "LiveIntent"/index.html)
[RevContent](/content/integrations/revcontent "RevContent"/index.html)
Google Ad Manager

Don't see yours?

No matches. If it has an API, we can connect it — most custom integrations go live in days.