Harold
AI document validation for ERPs — catches invoice errors before they hit your books.
If you're on Xero or QuickBooks and tired of fixing invoice errors manually, Harold's rules engine checks line items, totals, and supplier IDs before data hits your books—saving hours. The Founder Rate at £19/mo is a genuine bargain for early adopters, though document caps may pinch high-volume teams. For SMBs, it's a smarter pick than plain OCR tools like Klippa or Docparser, which lack validation. If you need deep multi-entity ERP integrations beyond Xero/QuickBooks, consider alternatives.
Verified 1d ago · liveness 70/100 · cite: rightaichoice.com/tools/harold
- Accountants processing high volumes of invoices who want to catch errors before they hit the books.
- Operations teams automating purchase order workflows with line-level validation.
- SMEs turning messy email invoice attachments into structured, validated data.
- Finance teams needing to export clean, ERP-ready data to Xero, QuickBooks, or a Zapier flow.
- Users who need free unlimited document processing — every tier is capped.
- Teams wanting on-premise or self-hosted deployment — this is cloud-only.
- Organizations requiring complex multi-entity ERP integrations beyond Xero and QuickBooks.
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Skip Harold if you need free unlimited processing, on-premise deployment, or complex multi-entity ERP integrations beyond Xero and QuickBooks—document caps and limited native integrations will frustrate you.
Going past your monthly document extraction limit requires upgrading to a higher tier, which can double or triple your cost if you're consistently over.
Harold's pricing is simple and predictable, starting at £19/mo for the Founder Rate (250 docs) and scaling to £149/mo for Enterprise (3,000 docs). This is competitive against per-document OCR tools like Klippa or Docparser, which often cost more per page. For small businesses, the Standard tier at £29/mo is affordable, though high-volume teams may find the 3,000-doc cap limiting compared to unlimited plans from competitors.
In short
Harold — AI document validation for ERPs — catches invoice errors before they hit your books. Best for Accountants processing high volumes of invoices who want to catch errors before they hit the books., Operations teams automating purchase order workflows with line-level validation., SMEs turning messy email invoice attachments into structured, validated data.. Plans from £19/mo.
What's new in Harold
Checked 6 days agoAcross the latest 3 updates: 3 news mentions.
We're starting a Q&A — because OCR, EDI and invoice automation are now one thing
Harold announces a public Q&A series addressing how OCR, EDI, and invoice automation are converging, with honest answers about current capabilities.
The Biggest Problems With AI Document Extraction (And What Actually Fixes Them)
Explains why basic OCR without business rules creates more work and how Harold's validation solves it.
Why Invoice OCR Without Business Rules Validation Creates More Work Than Manual Entry
Highlights the pitfalls of extraction-only tools and argues for validation-first automation.
Viability Score
How well maintained and how widely used is Harold? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: September 2026
How we score →Key Features
- AI extraction from invoices, receipts, purchase orders, statements
- Rule-based validation with IF-THEN checks and formulas
- Supplier alias mapping (e.g., 'DAVIDBRENT' → 'DB00001')
- Line item validation (qty × unit_price = line_total)
- Auto-flagging of total mismatches and missing fields
- Confidence scoring on extracted fields
- Output templates for CSV, Excel, JSON, webhook
- Document upload via web or email inbox
- ERP export to Xero and QuickBooks
- Zapier integration for 2000+ apps
- Live free trial with document training
- Web-based interface
- Cloud-only deployment
- PDF to ERP automation
- Automated export to ERP or Zapier flow
About Harold
Harold is an AI document automation tool that extracts, validates, and imports invoice data into ERPs like Xero and QuickBooks. Unlike typical OCR tools that only pull text, Harold applies a rules engine with IF-THEN checks to catch VAT mismatches, wrong totals, and missing fields before they reach your financial systems. Designed for accountants, operations teams, and SMEs, Harold turns messy invoices and purchase orders into clean, trustworthy data via upload or email. Harold's core strength is validation. It doesn't just extract—it checks every line item (qty × unit_price = line_total), flags total mismatches, and even fixes supplier aliases (e.g., 'DAVIDBRENT' → 'DB00001'). With confidence scoring on every field, you know exactly how reliable the data is before export. Output is flexible: CSV, Excel, JSON, webhook, or direct export to your ERP or Zapier flow. Setup is deliberately hands-off: no consultants, no setup calls. You train the AI on your documents, correct it when needed, and it gets smarter. Pricing is simple and predictable, with a Founder Rate of £19/month locked forever for early supporters. Standard starts at £29/month for small businesses, scaling to Enterprise at £149/month for high-volume operations. Compared to basic invoice OCR tools that create more manual rework, Harold's validation-first approach saves hours of admin time and prevents costly accounting errors. If you're on Xero or QuickBooks and want clean, ERP-ready data without the rechecking, Harold is built for you.
Behind the Verdict
Most OCR tools hand you text and call it a day. Harold's whole pitch is that extraction is the easy part — the real work is making sure the data is right before it lands in your ERP. That's a legitimately different angle, and for accountants who've spent hours rechecking VAT codes and supplier IDs, it's a message that lands. Pick Harold when you're on Xero or QuickBooks and your invoice volume is high enough that manual checking is eating your week. The validation rules are where it earns its keep — line item checks, total recalculation, supplier alias mapping. You can watch a VAT mismatch get flagged before it ever reaches your books. The Founder Rate at £19/mo is the real hook. Locked forever, 250 extractions a month — if you're an early-stage firm that fits the cap, that's a rare deal. Standard is a fair step up at £29, and the jump to Premium at £79 buys you 1,000 extractions and unlimited automations. Enterprise at £149 is where high-volume ops start to breathe. But the caps are real. Founder and Standard both cap at 250 extractions a month — that's roughly 10-12 documents per business day. If you're pushing much more than that, you'll be on Premium or Enterprise before you know it. For a busy practice handling multiple clients' AP, those caps can feel tight. There's no on-prem option, no multi-entity ERP integrations beyond Xero and QuickBooks, and no mention of free unlimited processing. If your stack starts and ends with those two ERPs, you're in the sweet spot. If you need NetSuite or SAP connectivity, look elsewhere. The team is leaning into the convergence of OCR, EDI, and invoice automation — their Q&A series hints at where they're heading. For now, the product is laser-focused on validation, and that focus is what makes it work. We'd reach for Harold
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Real-world workflow fit
Concrete scenarios for the personas Harold actually fits — and what changes day-one when you adopt it.
A client sends a batch of invoice PDFs via email. The accountant forwards them to Harold's unique inbox. Harold extracts all fields, runs rules checks, and flags a VAT mismatch on one invoice. The accountant reviews the flagged item, corrects it, and exports the clean data directly to Xero.
Outcome: The accountant saves hours of manual data entry and avoids a costly VAT error, with all invoices validated and exported in minutes.
The team processes hundreds of purchase orders weekly. Harold is set up with custom output templates matching their ERP's format. Line item validation ensures quantities and prices are correct. Errors are auto-fixed or flagged for review, and approved data is sent to QuickBooks via Zapier.
Outcome: The operations team automates PO processing, reducing rework and ensuring clean data flows into the ERP without manual checking.
A small business receives invoices as email attachments from various suppliers. The owner forwards them to Harold's inbox. Harold extracts, validates, and maps supplier aliases to internal IDs. The data is exported to Google Sheets via Zapier for the accountant.
Outcome: The owner eliminates manual data entry, gets clean, validated data in a familiar spreadsheet, and avoids accounting errors.
Use Cases
- Auto-validate invoice totals and VAT before exporting to Xero.
- Map supplier aliases to internal IDs to eliminate data entry errors.
- Forward emailed purchase orders to Harold's inbox for instant extraction.
- Build custom output templates to match your ERP's exact format.
- Run line-item checks to ensure quantities and prices add up correctly.
Limitations
- The tool is cloud-only with no mobile app.
- Native integrations currently shown are for Xero and QuickBooks, with other ERPs requiring CSV/Excel export or Zapier.
- Document extraction limits are as specified on the pricing tiers.
as of 2026-08-27
Verification history
We have re-verified Harold 6 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Harold tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Founder Rate
£19/mo
Ideal for
Early adopters and small businesses wanting a low-cost entry with 250 extractions/month and a locked price forever.
What this tier adds
Starting tier at £19/mo with 250 extractions, includes rules engine and Zapier, and price never increases.
Standard
£29/mo
Ideal for
Small businesses processing regular documents who need CSV/Excel export and email support.
What this tier adds
Same 250 extractions as Founder but no locked price; adds CSV & Excel export and email support.
Premium
£79/mo
Ideal for
Growing businesses with higher volume (1,000 extractions) needing unlimited automations and priority support.
What this tier adds
Scales to 1,000 extractions, 10 document boxes, unlimited automations and templates, plus priority support.
Enterprise
£149/mo
Ideal for
High-volume operations processing up to 3,000 documents/month with unlimited everything and dedicated support.
What this tier adds
Top tier at £149/mo with 3,000 extractions, unlimited boxes, automations, templates, and dedicated support.
Where the pricing makes sense
The company stage and team size where Harold's pricing actually pencils out — and where peers do it cheaper.
Harold's pricing is simple and predictable, starting at £19/mo for the Founder Rate (250 docs) and scaling to £149/mo for Enterprise (3,000 docs). This is competitive against per-document OCR tools like Klippa or Docparser, which often cost more per page. For small businesses, the Standard tier at £29/mo is affordable, though high-volume teams may find the 3,000-doc cap limiting compared to unlimited plans from competitors.
Setup time & first value
How long it actually takes to get something useful out of Harold — broken out by persona, not the marketing-page minute.
You can be up and running in under 15 minutes: create an account, upload a few sample documents, and train Harold on your document formats. Most users get their first validated export within an hour. No consultants or setup calls needed.
Switching to or from Harold
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Excel/Google Sheets: You can start using Harold for new invoices while keeping your spreadsheet for historical data. No formal migration needed, just start uploading documents.
Integrations
Resources & Guides
Tutorials & Learning
Official links
Tools that pair well with Harold
Common stack mates teams adopt alongside Harold, with the specific reason each pairing earns its keep.
Featured Head-to-Head Comparisons
Harold vs Screenplayiq
ScreenplayIQ and Harold serve completely different domains—screenwriting vs. accounting—so the choice depends entirely on your profession. If you're a screenwriter or producer seeking data-driven script feedback and box office forecasts, ScreenplayIQ's AI analysis and market predictions are valuable. If you're an accountant or operations manager needing to automate invoice validation and ERP import, Harold's rule-based extraction and error checking will save hours. No direct competition exists; pick based on your workflow.
Harold vs Bitsgap
If you're a crypto trader looking for automated bots with multi-exchange support, Bitsgap wins with its 6 bot types, backtesting, and demo mode. For finance teams processing invoices and purchase orders, Harold's AI validation and rule engine are purpose-built. They serve completely different needs — choose based on whether your asset is cryptocurrency or accounting documents.
Harold vs Geologicai
Choose GeologicAI if you're in mining critical minerals and need end-to-end core scanning, AI logging, and resource modeling with sub-48-hour turnaround. Choose Harold if you're a finance team drowning in invoices and purchase orders, needing automated extraction with rule-based error checking before ERP export. These tools serve entirely different domains and are not direct competitors.
Alternatives to Harold
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DocLine.ai
AI-powered document processing to extract structured data from invoices, receipts, contracts, and forms.
Frequently Asked Questions
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