Side by side
| Reason | Sintra | |
|---|---|---|
| Price | Pro $50 a month per person (3-day free trial for eligible new customers); Max $200 | Sintra X from $15.60 a month (12-month plan) to $48.50 (1-month plan), shown as sale prices; single helpers $39 a month |
| What you get | AI employees you define with your own instructions | Twelve named helpers, such as Soshie for social and Penn for copywriting |
| Where it works | Web, Mac and iOS apps, terminal, Slack; works on its own cloud computer or your Mac or PC | Its own web app |
| What starts work | Loops: a schedule, a webhook, a GitHub event or Slack messages | You, in its app |
| Tools | Connectors such as Google Workspace (Gmail sends with approval, Calendar), Slack, Stripe, PostHog and GitHub, plus MCP | Gmail, Google Calendar, LinkedIn, Notion, QuickBooks, Meta, Shopify, YouTube, TikTok and others |
| Writes and ships code | Yes: it is a coding agent first and opens pull requests in your repositories | No |
| Usage | Pro includes 1,250 credits a week | 250 credits a month |
Where Sintra fits better
- You want ready-made marketing and content roles without writing instructions.
- You want the lowest prepaid price and social media integrations such as Instagram, TikTok and YouTube.
Where Reason fits better
- The job is specific to your business and needs its own instructions and memory.
- It should run on a schedule or from Slack without you opening an app.
- It reads business data such as Stripe or PostHog, or touches code.
Pricing sources
Prices and features were read from each product's own website on November 1, 2026. They change often; check the linked page before you buy. Lindy, Sintra, Marblism, Grok Bot, CellCog, Viktor, Relevance AI, Devin, Artisan, 11x and Manus are trademarks of their owners. Reason Machines is not affiliated with or endorsed by them.
Questions
Is Reason a Sintra alternative?
Partly. Sintra is a bundle of marketing and content helpers; Reason is a general agent you set up for your own jobs, including data and code work. For social media posting on many networks, Sintra has more ready-made integrations.
Which is cheaper, Reason or Sintra?
Sintra, on price: from $15.60 a month on a 12-month plan on November 1, 2026, against $50 a month for Reason Pro. Reason's plan includes cloud computers and coding work, and it meters usage, so compare what each job needs.
Can a Reason AI employee answer phone calls?
No. Reason has no phone or voice receptionist features. Its AI employees work through a cloud computer, Slack, email you approve, calendars and the business tools you connect.