Kimai vs Clockify presents two different philosophies for time tracking: open‑source self‑hosted control versus cloud SaaS convenience. The decision often hinges on data residency, long‑term costs and integrations. This guide gives a practical, up‑to‑date comparison (2025–2026), a migration checklist, TCO scenarios and security analysis tailored for organisations and freelancers in England.
Why compare Kimai vs Clockify in 2026
Time tracking is no longer just about billing. Modern teams expect reporting, integrations, automation and data compliance. Kimai positions itself as an extensible, open‑source solution for teams prioritising control and privacy. Clockify offers a polished SaaS experience, fast onboarding and a large integration ecosystem.
- Kimai strengths: self‑hosting, unlimited customisation, predictable licence freedom.
- Clockify strengths: instant setup, managed infrastructure, frequent feature releases.
Recent trends (2025–2026) show increased demand for data sovereignty and cost transparency, especially across UK and EU organisations. For resources on open‑source governance and supply chain best practices, consult Linux Foundation and security guidance from OWASP.
Feature-by-feature comparison
Deployment and hosting
- Kimai: self‑hosted (Docker, VPS, managed hosting). Full control of data and updates. Typical setups use Docker Compose or a LEMP stack.
- Clockify: SaaS only with no self‑hosting option. Data hosted in provider data centres; SLAs differ by plan.
Resources for deployment: a practical Docker guide can be found at DigitalOcean.
Pricing and TCO
- Kimai: no licence fees for the software itself. Costs are hosting, maintenance, backups, and sysadmin time.
- Clockify: free tier for basic use; paid tiers scale per user with advanced features and support.
A clear TCO analysis must include direct costs (hosting, subscriptions) and indirect costs (maintenance, updates, downtime). A scenario table appears below with estimates for different organisations.
Privacy, compliance and data residency
- Kimai supports full data residency since the database is controlled by the host.
- Clockify stores data on provider infrastructure; contractual terms and EU/UK data processing addenda determine residency.
For GDPR guidance and controller/processor definitions, consult gdpr.eu.
Integrations and automation
- Clockify: prebuilt integrations with Slack, Jira, Zapier, Asana and many more.
- Kimai: integration via plugins, webhooks and the REST API. Zapier or middleware can be used to bridge services.
Official integration sources: Slack, Jira, Zapier.
Reporting, UX and mobile
- Clockify: polished UI, native mobile apps, advanced dashboards.
- Kimai: modern UI with strong reporting; mobile experience depends on plugins or API‑based front‑ends.
Side‑by‑side technical matrix
| Feature |
Kimai (self‑hosted) |
Clockify (SaaS) |
| Deployment |
Docker, VPS, managed hosting |
Cloud (no self‑host) |
| Cost model |
Hosting + maintenance (one‑time/recurring) |
Free to per‑user subscription |
| Data residency |
Full control |
Provider dependent |
| Integrations |
API, plugins, webhooks |
Native apps, Zapier ecosystem |
| Mobile apps |
Third‑party / API |
Official iOS/Android |
| Scalability |
Depends on infra |
Managed scaling |
| Security updates |
Maintained by ops |
Provider pushes updates |
| Custom fields |
Unlimited |
Limited by plan |
| Audit logs |
Configurable |
Included in higher plans |
Migration: step-by-step guide from Clockify to Kimai
Step 1 — Export data from Clockify
- Export time entries, projects, clients and users from Clockify in CSV or JSON.
- Verify export completeness by comparing totals per project and per user.
Step 2 — Prepare Kimai instance
- Provision server or Docker host with recommended resources (2 vCPU, 4GB RAM baseline for small teams).
- Install Kimai following official docs: Kimai Official.
- Configure database, TLS and backups.
- Map Clockify fields to Kimai entities: projects → projects, tasks → activities, time entries → timesheet records.
- Use transformation scripts (Python/Node) or CSV mapping tools.
- Import users last and validate permissions.
Step 4 — Validate and reconcile
- Run checksum comparisons: total tracked hours, billable rates, project totals.
- Validate reports and run a pilot with a subset of users.
Common issues and fixes
- Timezone mismatches: normalise timestamps to UTC before import.
- Rate and invoice mapping: ensure currency and rate fields align with Kimai configuration.
- Duplicate clients or projects: deduplicate before import using unique identifiers.
TCO scenarios (annual estimates, GBP)
| Profile |
Kimai (self‑hosted) |
Clockify (SaaS) |
| Freelancer (1 user) |
Hosting £60 + maintenance £120 = £180 |
Free to £48 |
| SMB (10 users) |
Hosting £300 + maintenance £1,200 = £1,500 |
£60‑£600 (tier dependent) |
| Enterprise (200 users) |
Hosting £2,400 + ops £12,000 = £14,400 |
£1,200‑£24,000 |
Notes: maintenance covers patching, backups and 1–2 hours/week sysadmin. Estimates updated with 2025–2026 inflation and typical UK cloud costs.
- Self‑hosted Kimai scalability depends on database tuning, PHP FPM workers, and caching. For larger teams, recommend replicated DB and load balancers.
- Clockify offloads scaling to provider; larger teams benefit from managed performance but should verify SLA.
Benchmark approach: use representative loads, concurrent users and reporting queries. For guidance on load testing web apps, consult OWASP testing methodologies.
Security, compliance and data residency
GDPR and legal considerations
- Kimai: data control enables precise compliance. Implement data retention, access controls and DPIA if processing sensitive data.
- Clockify: review the Data Processing Addendum and sub‑processor list; ensure contractual terms meet organisational needs.
Backups, updates and incident response
- Self‑hosting requires automated backups (daily DB dumps, encrypted offsite copies) and an update schedule.
- SaaS provides provider‑side backups; verify restoration SLAs.
Actionable security checklist:
- Enforce HTTPS and HSTS.
- Use strong DB credentials and rotate keys.
- Limit access via VPN or SSH bastion for admin interfaces.
- Monitor logs and set alerts for anomalous activity.
Real‑world use cases and recommendations
When to choose Kimai
- Organisations needing strict data residency, on‑prem requirements or deep customisation.
- Teams with internal devops capacity and a desire to avoid recurring per‑user fees.
When to choose Clockify
- Teams needing rapid deployment, polished mobile apps and minimal maintenance overhead.
- Organisations prioritising time to value and built‑in integrations.
Case study summaries (anonymised)
- Small digital agency switched to Kimai to keep client time data internal; saved ~30% annually when accounting for subscriptions and achieved better custom reporting.
- Consultancy firm remained on Clockify to access native integrations with their billing stack and reduce ops burden.
Migration checklist (downloadable approach)
- Export full dataset from Clockify (CSV/JSON).
- Stand up staging Kimai instance and test imports.
- Validate time totals and reports.
- Configure backups and TLS on production.
- Switch users and freeze old system after final reconciliation.
FAQs
Is Kimai free to use for commercial projects?
Kimai is licensed under an open‑source licence; no per‑user fees for the software itself. Hosting and support costs apply.
Can Clockify data be fully exported?
Clockify supports CSV/JSON exports for time entries, projects and users. Verification after export is recommended to ensure completeness.
Does Kimai offer integrations with Slack and Jira?
Kimai supports integrations via API and plugins. Integration with Slack and Jira can be achieved through webhooks, middleware or custom plugins.
Which option is better for GDPR compliance?
Self‑hosted Kimai gives more direct control over data residency and processing; Clockify may still comply if contractual terms and DPAs meet requirements.
How long does migration take for a 20‑user company?
With preparation and scripts, a typical migration pilot can complete in 2–5 days; full production cutover often requires 1–2 weeks for validation and training.
Are there managed hosting providers for Kimai?
Yes. Several third‑party hosts offer managed Kimai instances. Evaluate SLAs, backups and update policies before selecting a provider.
What are common migration pitfalls?
Timezone mismatches, rate mapping issues and missing project metadata are common. Deduplicate entities before import and test thoroughly.
Can Kimai scale to hundreds of users?
Yes, with proper infrastructure: replicated databases, caching and horizontal scaling for stateless web nodes. Performance depends on architecture choices.
Conclusion
Choosing between Kimai vs Clockify is a decision between control and convenience. Kimai suits organisations that prioritise data residency, customisation and predictable long‑term costs. Clockify serves teams that require rapid onboarding, a managed platform and built‑in integrations. The best choice follows from a short TCO analysis, a small migration pilot and verification of compliance obligations. For hands‑on deployment, consult the Kimai official docs at kimai.org and Clockify details at clockify.me.
