kalko Integrations
/ Reply.io
Kalko and Reply.io
Kalko researches a value for every merge field your Reply.io templates use, for each prospect, and writes approved values back. Each value carries the source it came from. Your campaigns stay in Reply.io, and Kalko never starts a sequence unless you arm Autopilot.
Key takeaways
- Kalko reads campaigns, steps, merge fields and contacts from Reply.io.
- It writes back only the custom fields your templates use, plus a Best sequence field and a Filled list.
- Campaigns never edit your steps or templates, and never start a sequence.
What does Kalko read from Reply.io?
- Campaigns and steps: the campaign name, the email steps and their delays, and A/B variants.
- Merge fields: the custom field definitions, and the tokens each template uses.
- Contacts: first name, company and title, and the current custom field values.
What does Kalko write back?
- Custom field values on your prospects, only for the fields your templates use.
- A Best sequence field that names the campaign with the strongest copy for each person.
- Membership in a Filled list, so you can filter and route prospects.
- Autopilot, once you arm it, enrolls the people it approved into the one sequence you chose, at the pace you set.
How do you connect Reply.io to Kalko?
- In Reply.io, open your avatar, then Settings, then Tools, then API keys.
- Create a key with access to contacts and sequences.
- In the Kalko app, open Integrations, choose Reply.io and paste the key.
- Open Campaigns in Kalko and pick the campaign to fill.
Questions people ask
Does Kalko send email through Reply.io?
Not by itself. You start sequences in Reply.io. The one exception is Autopilot, which enrolls approved people into the sequence you chose once you arm it.
Will Kalko change my Reply.io templates?
No. Kalko writes only custom field values, the Best sequence field and the Filled list. It never edits campaigns, steps or templates.
Where do I find my Reply.io API key?
In Reply.io, open your avatar, then Settings, then Tools, then API keys.
Sources
- Reply.io API reference, checked October 22, 2026
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