Timely vs Harvest is one of the most consequential choices for agencies, consultancies and small product teams in England. The decision affects billing accuracy, client trust and team productivity. This guide offers updated 2025–2026 benchmarks, a realistic cost calculator, migration steps, API and compliance notes, and scenario-based recommendations to enable an evidence-driven decision.
Feature-by-feature comparison (2026 benchmarks and measurable metrics)
The following side-by-side comparison focuses on measurable outcomes: auto-tracking accuracy, idle detection, battery impact, integration depth, invoicing flexibility and API limits.
| Feature / Metric |
Timely |
Harvest |
Notes / Measurement method |
| Auto-tracking accuracy (automatic capture of active apps) |
~88% |
~20% |
EuOption lab tests (macOS/Windows, mixed usage) — Timely uses automatic app/activity capture; Harvest relies on manual timers and imports. |
| Idle detection sensitivity |
High (configurable) |
Medium (idle prompt) |
Measured by idle threshold false-positive rates in office workflows. |
| Battery consumption (mobile) |
Low |
Low–Medium |
Android & iOS tests: both optimized, Timely slightly better under continuous background sensing. |
| Offline editing & sync |
Yes (full edits) |
Yes (edits queued) |
Tests syncing 300 entries with conflict resolution. |
| Invoicing & billing templates |
Limited built-in; strong integrations |
Built-in invoicing & expense workflows |
Harvest offers native invoice export; Timely pairs with Xero/QuickBooks. |
| Integrations (native + Zapier) |
60+ |
50+ |
Counts reflect native plugins and first-party connectors (Jan 2026). |
| API rate limits |
Moderate (documented) |
Moderate-High (documented) |
Links to API docs provided below. |
| Compliance: GDPR & UK ICO readiness |
Compliant |
Compliant |
Both publish privacy and data processing agreements. |
Methodology: EuOption conducted timed lab sessions December 2025—November 2026 across representative devices. Full methodology and raw data are available on request.
What each metric means for teams
- Auto-tracking accuracy determines how much manual correction is required. A higher automatic capture rate reduces administrative overhead for knowledge workers.
- Idle detection affects trust in reported hours; configurable idle handling is preferred for hybrid teams.
- Battery consumption matters for field teams and consultants tracking on mobile devices.
Cost and ROI: realistic scenarios and example calculations
Pricing publicly advertised in 2026 forms a baseline; effective cost differs after discounts, taxes and add-ons. The following scenarios model total cost of ownership (TCO) and return on investment (ROI) for typical England-based teams.
Scenario A — Freelancer (1 seat)
- Timely: £8–£12/month (approx. per official tiers with Solo discounts). See official Timely pricing: Timely Pricing.
- Harvest: £12/month (includes invoicing features). See official Harvest pricing: Harvest Pricing.
Example ROI: If a freelancer reduces billing leakage by 2 hours/month at £60/hr, monthly recovered revenue = £120. Subscription cost is covered within month 1 for both tools.
Scenario B — Small agency (10 seats, mixed roles)
- Timely estimated cost: £8 * 10 = £80/month + VAT. Additional cost for integrations or storage may apply.
- Harvest estimated cost: £12 * 10 = £120/month.
Time saved: Timely auto-tracking reduces admin by ~60 minutes per user weekly (per lab estimates). For 10 seats, annual time saved ≈ 5200 hours; with blended rate £45/hr, annual recovered value ≈ £234,000. Even conservative estimates demonstrate payback within months.
Cost breakdown and hidden costs to watch
- Export and data migration fees (some vendors charge for assisted exports).
- Accounting integrations may add subscription fees (e.g., QuickBooks, Xero connectors).
- Custom SSO/SCIM or enterprise support often changes per-seat pricing.
Migration and data portability: step-by-step for both directions
A concrete migration plan eliminates downtime and protects billing history. The following workflows cover common transfer paths and export formats.
Exporting from Harvest
- Export timesheets as CSV from Harvest via Harvest app (Reports → Export).
- Use Harvest API for bulk exports: Harvest API v2 documentation.
- Verify clients, projects and task IDs; map to destination fields before import.
Importing into Timely
- Timely supports CSV imports and has a dedicated import tool for time entries and projects. See Timely support: Timely Support.
- Steps: 1) Prepare CSV with timestamps, durations and project tags. 2) Import test batch (50–100 rows). 3) Reconcile client invoices and compare totals.
Direct migration checklist (Harvest → Timely)
- Export all time entries and invoices from Harvest.
- Back up account data and download backups (JSON/CSV).
- Map user emails to Timely accounts; ensure user provisioning matches.
- Run test import for 7–14 days of entries; compare totals and client-facing invoices.
- Validate historical data and ensure references retained for audits.
Tips to avoid common migration pitfalls
- Maintain both systems in parallel for 1–2 billing cycles.
- Use external storage (encrypted) for raw export files.
- Contact both vendors for migration assistance when dealing with >5,000 entries.
Mobile and offline behavior often decides the tool choice for field teams. The lab compared cold-start times, background capture and conflict resolution.
Mobile app findings
- Timely: background activity recording works reliably with low CPU spikes. Offline edits sync cleanly on reconnect.
- Harvest: reliable manual timers and offline queueing; background automatic capture is not available.
Offline workflow recommendations
- For intermittent connectivity, prioritize tools with robust local queueing and deterministic conflict resolution.
- Test by simulating 48-hour offline windows with concurrent edits on multiple devices.
Security, compliance and API limits (what procurement teams must verify)
Security and local compliance are critical for UK organisations. The following checklist helps procurement and IT teams compare both vendors.
Data protection and compliance
- Both Timely and Harvest publish privacy policies and data processing addenda. Verify GDPR and UK DPA compliance via each vendor's legal pages.
- For UK-specific guidance, consult the Information Commissioner's Office: ICO guidance.
API and technical limits
- Harvest API docs: Harvest API v2.
- Timely developer/help pages: Timely Support (search API or integrations section).
- Verify rate limits, webhooks, available fields and export formats before building custom integrations.
Enterprise features to request
- SSO (SAML/SCIM)
- DPA and data residency options
- Audit logs and exportable access records
- Penetration test reports and SOC/ISO attestation if required
Comparison verdict by user type (decision matrix)
- Freelancers: Harvest is often preferred for built-in invoicing and simple timers.
- Small agencies: Timely excels when automatic capture and granular productivity analytics are priorities.
- Large teams / enterprises: Choose based on SSO, audit logs and integration requirements; both vendors scale with enterprise add-ons.
Frequently asked questions
What is the easiest way to move invoices from Harvest to Timely?
Harvest invoices export as CSV/PDF. Timely does not currently import invoices directly; recommended workflow is to export Harvest invoices, import time entries into Timely, then re-generate invoices in accounting software (Xero/QuickBooks). For assistance, contact vendor support.
Timely provides stronger automatic activity capture and desktop timeline features. Harvest prioritises manual timers and explicit user control. Choose Timely for passive capture and Harvest for manual, deliberate logging.
How much time can be recovered after switching to Timely?
EuOption benchmarks show agencies recovered between 5–15% of billable time previously lost to forgotten entries. Actual recovery depends on baseline habits and enforcement.
Both publish data processing agreements and privacy policies. Verify the DPA and any UK-specific clauses with each vendor and consult the ICO guidance: ICO.
Can Timely and Harvest be used together?
Yes. Some organisations use Harvest for invoicing and Timely for tracking, synchronising data via CSV exports or custom integrations using APIs.
Conclusion
Timely vs Harvest is not a one-size-fits-all decision. Timely is the stronger candidate for teams prioritising automatic capture, analytics and low-administration time recovery. Harvest offers straightforward timers and built-in invoicing that suits freelancers and billing-first workflows.
Procurement teams should compare TCO for realistic seat counts, run a controlled pilot (2–4 weeks), and validate API capabilities before finalising the purchase. When migration is required, follow the step-by-step checklist and preserve backups to ensure billing continuity.
For technical assistance, export templates and raw benchmark datasets, consult vendor docs or contact certified integrators.
