kitio.aiisLucid vs 21X
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. isLucid starts at See pricing page and 21X starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Inbound and outbound voice agents
- Email triage and replies
- Call analysis
- Live call transfer
- On-premises option
- 50+ languages
- AI voice agents
- SMS, RCS and email agents
- Lead qualification
- Appointment scheduling
- Call routing and transfer
- Conversational API
| Feature | isLucid | 21X |
|---|---|---|
| Best for | AI voice, email and insight agents for call centers and support teams | Conversational AI for voice, SMS and email sales and service |
| Category | Customer support | Customer support |
| Pricing model | Free trial | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No, 14-day trial | No |
| Made by | isLucid | Structurely |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
isLucid starts at See pricing page and 21X starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Starter
€1,625/mo
- 3,300-minute usage pool
- 2 concurrent calls
- EU hosting
- 2 seats
Premium
€2,925/mo
- 35,000 usage pool
- Bring your own number (SIP)
- WhatsApp calling
- 5 seats
Scale
€4,945/mo
- 90,000 usage pool
- Fully local models
- Managed optimisation
- Unlimited seats
Enterprise
Contact sales
- Custom capacity
- SLA with credits
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
isLucid
- 14-day free trial on every plan
- Supports a wide range of languages
- On-premises option for data control
- Plans start at €1,625 per month
- Extra minutes billed on top of the pool
- Pricing excludes VAT
21X
- Covers voice, text and email
- API for headless use
- Low per-minute voice rates
- Platform fee not published
- Lowest voice rate needs your own carrier
- Requires guided onboarding
Which one should you choose?
Choose isLucid if you want:
- 14-day free trial on every plan
- Supports a wide range of languages
- On-premises option for data control
Watch out: plans start at €1,625 per month.
Choose 21X if you want:
- Covers voice, text and email
- API for headless use
- Low per-minute voice rates
Watch out: platform fee not published.
isLucid vs 21X FAQ
What is the difference between isLucid and 21X?
isLucid: AI voice, email and insight agents for call centers and support teams. 21X: Conversational AI for voice, SMS and email sales and service. Both are customer support tools.
Is isLucid or 21X cheaper?
isLucid starts at See pricing page and 21X starts at See pricing page. Check both pricing pages for current plans.
Do isLucid and 21X have free plans?
isLucid: No, 14-day trial. 21X: No.
Who makes isLucid?
isLucid is made by isLucid.
Who makes 21X?
21X is made by Structurely, based in United States.
Which should I choose, isLucid or 21X?
Choose isLucid if you value 14-day free trial on every plan and supports a wide range of languages. Choose 21X if you value covers voice, text and email and api for headless use.