kitio.aiUBOS vs Postfleet
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. UBOS starts at See pricing page and Postfleet starts at $7/mo. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Multi-agent system builder
- 1,000+ API integrations
- Drag-and-drop web apps
- Agent template marketplace
- Source code export
- Bring your own cloud
- Agent mailboxes
- Prompt injection screening
- Schema-based extraction
- Email classification
- REST and MCP access
| Feature | UBOS | Postfleet |
|---|---|---|
| Best for | Low-code platform for building and hosting multi-agent AI systems | Email inboxes for AI agents with prompt-injection screening |
| Category | Agents & automation | Agents & automation |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $7/mo |
| Free plan | Yes | Yes |
| Made by | UBOS | Postfleet |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
UBOS starts at See pricing page and Postfleet starts at $7/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
5 plans
Free
Free
- Free server
- Up to 3 seats
Production Server
~$0.02 / hour
- 2 vCPU, 4 GB RAM
- Dedicated instance
- $15 credits included
Startup
$39/mo billed yearly
- Team features for startups
Team
$89/mo billed yearly
- Role-based access controls
Enterprise
$149/mo billed yearly
- Dedicated support
- Bring your own cloud
4 plans
Free
Free
- 100 messages to JSON per month
- 3 mailboxes
- 3,000 sends per month
Starter
$7/mo
- 250 messages to JSON per month
- 5 mailboxes
- Email support
Pro
$20/mo
- 1,500 messages to JSON per month
- 10 mailboxes
- Custom sending domains
Scale
$200/mo
- 25,000+ messages to JSON
- 150 mailboxes
- Multiple custom domains
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
UBOS
- Free server to start
- Export your source code
- Can run on your own cloud
- Listed plan prices are annual
- Pricing mixes plans and hourly servers
- Broad platform takes time to learn
Postfleet
- Free tier with no card
- Strips hidden content before the model
- Typed JSON output
- Model checks capped by monthly limits
- Aimed at developers only
- Custom domains start on Pro
Which one should you choose?
Choose UBOS if you want:
- Free server to start
- Export your source code
- Can run on your own cloud
Watch out: listed plan prices are annual.
Choose Postfleet if you want:
- Free tier with no card
- Strips hidden content before the model
- Typed JSON output
Watch out: model checks capped by monthly limits.
UBOS vs Postfleet FAQ
What is the difference between UBOS and Postfleet?
UBOS: Low-code platform for building and hosting multi-agent AI systems. Postfleet: Email inboxes for AI agents with prompt-injection screening. Both are agents & automation tools.
Is UBOS or Postfleet cheaper?
UBOS starts at See pricing page and Postfleet starts at $7/mo. Check both pricing pages for current plans.
Do UBOS and Postfleet have free plans?
UBOS: Yes. Postfleet: Yes.
Who makes UBOS?
UBOS is made by UBOS.
Who makes Postfleet?
Postfleet is made by Postfleet.
Which should I choose, UBOS or Postfleet?
Choose UBOS if you value free server to start and export your source code. Choose Postfleet if you value free tier with no card and strips hidden content before the model.