US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
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Squarespace-owned scheduling, US-incorporated.
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Ordered by feature parity and migration friction, which is weighted higher than feature breadth.
US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
Nottingham UK developer-API-first calendar / scheduling platform (Cronofy, founded 2013), ISO 27001 + SOC 2; Wise / GoCardless / Indeed customers.
Brno-based Czech booking platform (Reservio s.r.o., ABUGO Group), 500k+ businesses, freemium with branded customer apps.
All 5 alternatives, benchmarked against Acuity Scheduling.
US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
Nottingham UK developer-API-first calendar / scheduling platform (Cronofy, founded 2013), ISO 27001 + SOC 2; Wise / GoCardless / Indeed customers.
Brno-based Czech booking platform (Reservio s.r.o., ABUGO Group), 500k+ businesses, freemium with branded customer apps.
Amsterdam-based Dutch appointment scheduling (SuperSaaS B.V., founded 2007 by Jan M. Faber), unfunded founder-owned, 205k+ businesses, 35 languages.
Swiss group-scheduling pioneer (Doodle AG, Zurich, 2007), owned by TX Group (SIX-listed Swiss media holding); SOC 2 + GDPR + HIPAA.
| Product | Hosting | Sovereignty | Cert. | Pricing | Signals | Open |
|---|---|---|---|---|---|---|
|
Acuity Scheduling
benchmark · US
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— |
US-LINKED | SOC 2 no EU framework |
Freemium |
E2E
Public DPA
Sub-processors
Open source
|
|
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US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
|
US
United States
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SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
|
— | Freemium |
Public DPA
Sub-processors
Open source
|
→ |
|
Nottingham UK developer-API-first calendar / scheduling platform (Cronofy, founded 2013), ISO 27001 + SOC 2; Wise / GoCardless / Indeed customers.
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—
United Kingdom
|
SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
|
ISO/IEC 27001
SOC 2
|
Paid |
Public DPA
Sub-processors
Open source
|
→ |
|
Brno-based Czech booking platform (Reservio s.r.o., ABUGO Group), 500k+ businesses, freemium with branded customer apps.
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CZ
Czechia
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SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
|
— | Freemium |
Public DPA
Sub-processors
Open source
|
→ |
|
Amsterdam-based Dutch appointment scheduling (SuperSaaS B.V., founded 2007 by Jan M. Faber), unfunded founder-owned, 205k+ businesses, 35 languages.
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NL
Netherlands
|
SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
|
— |
Freemium
€8 /mo
|
Public DPA
Sub-processors
Open source
|
→ |
|
Swiss group-scheduling pioneer (Doodle AG, Zurich, 2007), owned by TX Group (SIX-listed Swiss media holding); SOC 2 + GDPR + HIPAA.
|
DE
Germany
|
SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
|
SOC 2
|
Freemium |
Public DPA
Sub-processors
Open source
|
→ |
Beyond compliance: how these alternatives compare on the capabilities you actually use day to day.
| Feature | Cal.com | Cronofy | Reservio | SuperSaaS | Doodle |
|---|---|---|---|---|---|
| Payment collection | Yes | Yes | Yes | Yes | |
| White-label | Yes | Yes | Yes | Yes | Yes |
| Calendar sync | Yes | Yes | Yes | Yes | Yes |
| Round-robin / team | Yes | Yes | No | ||
| Group bookings | Yes | Yes | Yes | Yes | Yes |
| Video integration | Yes | Yes | No | Yes | Yes |
| Automated reminders | Yes | Yes | Yes | Yes | Yes |
| Free tier | Yes | No | Yes | Yes | Yes |
Listed for transparency. Every product on this page is benchmarked against this baseline.
Listed for transparency. Every product on this page is benchmarked against this baseline.
Squarespace-owned scheduling, US-incorporated.
For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.
Reviewed by the EU Vetted editorial team · Editorial guidelines