I have used Harvest for years. It is a good tool, with clean time tracking, simple invoicing, and an established brand. I built Rozuro because of the specific things it does not do, not because Harvest is bad at the things it does. This is what changed for me, and why I eventually moved. If you are evaluating a move yourself, I would rather you make the call with a clear picture than a marketing pitch.
What Harvest gets right
Before I go into the gripes, Harvest’s core flow is one of the cleanest in the category. Start a timer, stop a timer, add an invoice line. The mobile app is solid, the team-level visibility works, and for solo consultants doing local-currency invoicing it is hard to beat the speed of getting started.
If your billing fits inside a Harvest invoice template, and your accountancy fits inside a quarterly CSV export to your bookkeeper, you probably do not need anything else. I want to acknowledge that up front, because I lived in that mode for a long time and it was fine.
Where it stopped working for me
Invoice numbering
The number sequence was not always continuous. Once or twice a year I would find a gap, usually after a deleted draft or an edge case I never fully diagnosed. For a freelancer in NL that is a problem. The Belastingdienst, and the equivalent tax offices across the EU, require continuous, non-gap invoice numbering for audit purposes. Sequence gaps make you look like you have deleted invoices to hide income, even when you have not.
The first time I had a Belastingdienst horizontaal-toezicht conversation, the controller spent ten minutes asking why invoice number 2023-0147 was missing. It was not missing. The counter had skipped it after I voided a duplicate draft. But the burden of proof was on me. I had to dig through Harvest’s deleted-items log, export it, annotate it, and submit a written explanation. The whole detour cost half a day and a small consultancy fee to my accountant for the formal reply. Multiply that by the years I had been on the platform and the math gets ugly.
In Rozuro the numbering is enforced server-side, automatically, with no way to rewrite the sequence after the fact. A sent invoice cannot be edited or deleted, and only a credit note can offset it. Drafts get their own series. There is no scenario where the real series shows a gap. Boring, but it is the kind of detail your accountant will love, and the kind of detail that turns a fifteen-minute audit question into a non-event.
No real accountancy layer
Harvest gives you reports, not a ledger. For EU bookkeeping you need more than a P&L. You need ICP exports for EU B2B sales, VAT breakdowns per code, audit trails on every state change. I ended up building a separate database tool on the side just to bridge the gap between Harvest’s exports and the format my accountant actually wanted.
The specifics, for anyone who has never had to file one. In the Netherlands every EU B2B sale needs to show up on the quarterly ICP (intracommunautaire prestaties) declaration, broken down by customer VAT number, period, and total amount. Germany’s Zusammenfassende Meldung and France’s DEB/DES are the same idea with different forms. Harvest’s CSV export does not classify lines by VAT treatment, so I would manually re-tag every EU-reverse-charge invoice in a spreadsheet before forwarding it to my accountant. Every quarter, for years. Add the per-code breakdown the BTW-aangifte itself expects (domestic 21%, domestic 9%, reverse-charge, export, exempt) and you are effectively rebuilding a chart of accounts in Excel.
That separate tool became the prototype for what is now Rozuro’s core: a true double-entry ledger that sits underneath the invoicing and time tracking, not bolted on as a report tab. Every invoice line carries its VAT code at the source. ICP and the per-code aangifte breakdown fall out of the ledger automatically. No re-tagging, no spreadsheet, no quarterly Sunday afternoon.
UX inconsistencies
Less critical, more death-by-a-thousand-cuts. The save button lives in different places across different forms. Some modals lose their state when you click outside. The handoff from time entry to invoice requires multiple confirmations even when the line items are obvious. None of these are dealbreakers in isolation, but compounded over years they add real friction.
When I designed Rozuro’s forms I went the other way. One consistent save position, no destructive defaults, and explicit immutability cues so you know what you can and cannot change.
API limits
This is the bit that finally pushed me over, because Harvest does have an API, but it is read-heavy and write-light. You can pull most things, you cannot create or update everything you would want to from the outside. Subscription state transitions, certain expense fields, recurring schedule mutations, the endpoints needed for those simply are not there. On top of that, rate limits and pagination quirks show up the moment you try to sync nightly.
The concrete example that broke me. I wanted to auto-issue a recurring monthly invoice when a Stripe subscription renewed, with the correct VAT code based on the customer’s country, and have the resulting PDF emailed and pushed to the customer portal. Reading the Stripe webhook was trivial. Creating the Harvest invoice with a custom number, VAT code, and a non-default email template was not. I ended up running a nightly script that exported a Stripe ledger, generated invoices in a separate tool, and uploaded the PDFs to Harvest by hand for the audit trail. That is not automation. It is a part-time admin job dressed up in a cron expression.
The connector marketplace papers over a lot of this for common integrations like Zapier and Xero, but you cannot build a real custom flow on top. If you want every UI action to also be an automation hook, Harvest is not designed for that.
What I built instead
For each pain point above, Rozuro takes the opposite stance.
Strict, continuous invoice numbering enforced server-side. Invoices become immutable on send. Credit notes are the only way to reverse a sent invoice. Zero gaps, full audit trail, your accountant smiles.
Built-in EU compliance: BTW codes, ICP exports for EU B2B sales, VIES VAT-number validation, UBL/Peppol on the roadmap. No plugins required.
Every UI action is also a REST endpoint with the same auth, the same validation, the same ledger writes. Webhooks fire on every state change with signed payloads. If you can do it in the product, you can automate it from your own code.
Double-entry ledger as the core, not a report tab. P&L and balance sheet are derived from the ledger, not assembled from invoice exports.
The thread tying these four together is a deliberate one. One source of truth, accessed identically from the UI and the API, with immutability treated as a feature rather than something to work around. The auth that gates a button in the web app gates the same endpoint over HTTPS. The validation that prevents a bad invoice in a form runs verbatim against a JSON payload. The ledger writes are the same writes either way. That sounds boring to a marketer and reassuring to a finance team, which is roughly the audience split I was aiming for.
Feature matrix
| Feature | Rozuro | Harvest |
|---|---|---|
| REST API (full CRUD) | Yes, every UI action is also an endpoint | Partial, read-heavy and write-light |
| Webhooks | Signed events on every state change | Limited to a few resources |
| EU VAT compliance (BTW/MwSt/TVA) | Built-in, with code-level breakdown | Manual or via integrations |
| ICP / EC sales list export | Built-in | Not available |
| Continuous invoice numbering (audit-grade) | Enforced, immutable after sent | Sequence gaps possible |
| Invoice immutability after sent | Enforced | Editable |
| Double-entry ledger | Core of the product | Not present |
| Multi-currency | Yes | Yes |
| Mobile app | Web-responsive (native planned) | Native iOS and Android |
| Integrations marketplace | Growing, plus full API | Extensive third-party catalog |
What Rozuro is not (yet)
I am not going to pretend we have won this comparison. Here are the gaps I actually see.
Mobile app maturity. Today the product is web-responsive, fine on a phone but not a native app. A native iOS app is on the roadmap. If you live in your tracker on the go and need native polish, Harvest still wins this specific battle.
Integrations marketplace. Harvest has years of third-party connectors. We have a full API and a smaller, but growing, catalog of direct integrations. If your workflow lives inside an existing Harvest, Xero, and Stripe pipeline, you will need to either rebuild it via our API or wait for direct integrations to catch up.
Community. Harvest has been around since 2006. We have hundreds of early users and a public roadmap, not a forum with a decade of accumulated answers.
Expense receipt OCR. Harvest and FreshBooks let you snap a photo of a receipt and pull the vendor, amount, and date out automatically. We do not yet. Expenses today are a manual line. It is on the roadmap because a third of the early-user feedback asked for it, but if you process a lot of cash expenses, that is a real gap today.
If those gaps are dealbreakers, stay where you are. I would rather you not move and regret it.
Migration
If you do want to move, clients import via CSV from the Harvest export in one shot. Invoices and time entries can be migrated via the API. For your first hundred records I will do the migration personally. Drop a note and we will set it up. The form lives at /migrate/harvest.
Bottom line
Use Harvest if it fits your flow. Switch to Rozuro if you have outgrown the reporting, hit the API ceiling, or need real EU compliance instead of a plugin.
If you want to test it for an hour, start free at /register. No credit card. Or contact us if you want to talk through whether it is worth the move.
Love, Marten.