Cronofy and Zeeg both sit in the scheduling space, but they're built for different buyers: Cronofy is developer-facing calendar and scheduling infrastructure…
Best for Cronofy: Teams building software that needs calendar sync or scheduling as an embedded feature, especially where an MCP server for agentic AI workflows, meeting transcription, or certified multi-region compliance (ISO 27001/27701/27018, SOC 2 Type 2) matters.
Best for Zeeg: Sales or service teams that want a ready-made booking page plus an AI phone agent that qualifies inbound callers and books meetings, with transparent per-user pricing and GDPR-only EU data hosting.
At a Glance
Cronofy
Zeeg
Primary category
Scheduling
Scheduling
Rating
Not documented
Not documented
Pricing model
Subscription (per-active-user and API usage-based)
freemium
Starting price
$15/month per active seat
Free plan available; paid plans from EUR 10 per user per month billed annually
Free plan
Yes
Yes
Free trial
Yes
Not documented
Platforms
Web
Web
Team collaboration
Not documented
Not documented
AI features
Yes
Yes
Public API
Yes
Not documented
Key Differences
Product model: API infrastructure vs. end-user app
Cronofy: Calendar sync API and scheduling API meant to be embedded inside another company's software, plus pre-built UI components.
Zeeg: A direct, standalone scheduling app with booking pages and an AI voice agent that answers and qualifies calls.
Determines whether you're buying a building block for your own product or a finished tool your team uses directly.
AI capability focus
Cronofy: Meeting transcription with AI-generated summaries and an MCP server for connecting calendar data to agentic AI workflows.
Zeeg: An AI voice agent that answers inbound calls, has a qualifying conversation, and books the right meeting automatically.
One augments developer/agent workflows after the fact; the other automates the live call-to-booking process itself.
Pricing transparency
Cronofy: Self-serve pricing is not published; the pricing page uses a usage-based seat calculator.
Zeeg: Publishes explicit per-user tiers from a free Starter plan up to €40/user/month, plus a custom Enterprise plan.
Buyers who need to budget precisely without a sales call will find one tool far easier to plan around.
Compliance and data hosting
Cronofy: States ISO 27001/27701/27018 certification, SOC 2 Type 2 attestation, and data centers across the US, UK, Canada, Germany, Australia, and Singapore.
Zeeg: Described as GDPR-compliant with data hosted in Europe.
Global enterprises with multi-region data residency needs have different requirements than EU-focused teams.
Feature-by-Feature
Core Features
Feature
Cronofy
Zeeg
Calendar sync across multiple providers
Available
Available
Developer scheduling API
Available
Not documented
Booking pages / scheduling UI
Available
Available
Automatic video conferencing links
Available
Available
Round-robin lead/meeting routing
Not documented
Available
AI Capabilities
Feature
Cronofy
Zeeg
AI phone/voice agent
Unavailable
Available
Meeting transcription with AI summaries
Available
Not documented
MCP server for agentic AI workflows
Available
Not documented
Pricing & Compliance
Feature
Cronofy
Zeeg
Free tier / sandbox
Available
Available
Published self-serve pricing tiers
Unavailable
Available
Formal security certifications (ISO/SOC 2)
Available
Not documented
GDPR compliance stated
Available
Available
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Cronofy
Team (Scheduler) — $15/month per active seat Monthly
Business (Scheduler) — $799/month (up to 50 active seats) Annual
Enterprise (Scheduler) — ~$2,999/month Annual
Starter (API) — ~$139/month Monthly
Strategic (API) — Custom Custom
Zeeg
Starter — Free N/A
Professional — EUR 10/user/month (annual) or EUR 12/user/month (monthly) monthly or annual
Business — EUR 16/user/month (annual) or EUR 20/user/month (monthly) monthly or annual
Scale — EUR 30/user/month (annual) or EUR 40/user/month (monthly) monthly or annual
Enterprise — Custom custom
Pros & Cons
Cronofy
Pros
Deep specialization in real-time, multi-provider calendar sync rather than a bolt-on feature of a broader product
Strong presence in HR tech and recruiting through integrations with major ATS platforms like Greenhouse and Lever
Dynamic 'active user' billing avoids paying for provisioned-but-unused seats
Separate API-only pricing lets pure developer integrators pay based on usage rather than per-seat Scheduler pricing
Cons
Business and Enterprise Scheduler tiers ($799/month and up) are significantly pricier than consumer scheduling tools like Calendly
API pricing tiers scale quickly with usage volume, which can be hard to predict for growing integrations
A $99/month minimum commitment applies to standalone use of the Meeting Agents AI feature
Primarily positioned for B2B and developer use cases, offering less value for individual solo schedulers
Zeeg
Pros
Data hosted exclusively in Germany for strong GDPR compliance
Includes an AI voice agent for phone-based booking, unusual among scheduling tools
Usable free plan with unlimited events
Cons
Smaller brand recognition than Calendly in English-speaking markets
Advanced features like SSO and SCIM are reserved for higher tiers
AI voice agent is a newer addition with a shorter track record
Per-user pricing can add up for larger teams
Use Cases
Choose Cronofy: Teams building software that needs calendar sync or scheduling as an embedded feature, especially where an MCP server for agentic AI workflows, meeting transcription, or certified multi-region compliance (ISO 27001/27701/27018, SOC 2 Type 2) matters.
Choose Zeeg: Sales or service teams that want a ready-made booking page plus an AI phone agent that qualifies inbound callers and books meetings, with transparent per-user pricing and GDPR-only EU data hosting.
Need both: Companies that build products embedding calendar sync via Cronofy's API while separately running their own outward-facing appointment booking and lead qualification through Zeeg — the two solve adjacent but non-overlapping problems.
Cronofy
Interview scheduling for recruiting teams — Talent acquisition teams use Cronofy's integrations with Greenhouse, Lever, and SmartRecruiters to coordinate panel interviews across multiple interviewer calendars.
Embedded scheduling in SaaS products — Developers use Cronofy's Calendar API to build native scheduling and availability features directly into their own product, such as a telehealth or services marketplace app.
Meeting booking links — Sales and customer success teams use Cronofy's embeddable Scheduler links to let prospects and customers book meetings without back-and-forth emails.
Zeeg
GDPR-compliant scheduling — Run booking pages and meeting scheduling with data hosted entirely in the EU.
Lead distribution via round-robin — Automatically distribute inbound meetings across available sales or support reps.
AI-handled phone bookings — Use the AI voice agent to answer calls and book meetings without staffing a phone line.
Frequently Asked Questions
Does Cronofy or Zeeg offer a free plan?
Both do — Cronofy offers a free sandbox connecting up to 20 accounts with 24 hours of meeting recording and no credit card required, while Zeeg's Starter plan is free forever with 2 scheduling pages and 1 calendar connection.
Which calendars does each tool support?
Cronofy syncs with Google, Microsoft, Apple, and Exchange calendars from a single integration; Zeeg integrates with Google Calendar, Outlook, Office 365, Exchange, and iCloud.
Does either tool use AI?
Cronofy offers an MCP server for agentic AI workflows and AI-generated meeting summaries via transcription; Zeeg's AI voice agent answers inbound calls, qualifies leads, and books meetings automatically.
How is pricing structured?
Cronofy doesn't publish self-serve pricing and instead uses a usage-based seat calculator on its pricing page; Zeeg publishes explicit per-user tiers from free up to €40/user/month, plus a custom Enterprise plan.
What compliance certifications does each hold?
Cronofy states ISO 27001/27701/27018 certification and SOC 2 Type 2 attestation with data centers across the US, UK, Canada, Germany, Australia, and Singapore; Zeeg is described as GDPR-compliant with data hosted in Europe.