The verdict
If your repeatable work is contracts, intake forms and approvals, pick airSlate. Ask for a demo of altaFlow specifically, because the brand has changed shape. If you run an online store and want a welcome series or an abandoned cart message sent by itself, pick Klaviyo. It has a free plan, so you can test it on real data first.
If you sell services to other businesses with long sales cycles, I would pick neither as a starting point. A CRM such as HubSpot fits that case better, and a lean e-signature tool covers the odd contract. Klaviyo is built around B2C commerce and has no deals pipeline.
Side by side
| 5 points compared | ||
|---|---|---|
| Starts at | $20/mo | |
| Free plan | Yes | |
| API | Yes | Yes |
| MCP server | No | Yes |
| Built-in AI | Yes | Yes |
| Links |
Plans and pricing
airSlate
Pricing not in our catalogue yet.
Klaviyo
- FreeFree
- Composer$20/mo
Who each is for
Choose airSlate if…
Pick airSlate if your team is in operations, HR, legal or finance and the same documents come round again and again. Think of NDAs, onboarding packs, client agreements and approval forms. It earns its place when you can say how many of them you handle each month.
It suits a company that wants an operations person to build the flow without code. Plans are priced by quote, with unlimited users, so ask what counts as volume. Skip it if you only sign a contract now and then.
Choose Klaviyo if…
Pick Klaviyo if you sell products online and your list gets the same message whatever people did. It ties email and SMS to purchases, views and abandoned carts, and shows the revenue from each flow. It has an official MCP server, so AI tools can read reports and help build campaigns.
It works best when your store sends clean data and someone owns the flows. Costs rise with your contact list, so check the real figure for your list before you move. If you do not sell products, most of it will sit unused.
Other options worth a look
Connects web applications and automates workflows using event triggers and actions without writing code.
No-code platform for building branded forms, surveys, and quizzes without requiring any coding skills.
Connect APIs and build event-driven workflows with a visual builder that also allows custom code.