Flat Invoice vs TaxSnapper
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Flat Invoice compared with TaxSnapper
| Detail | FI
Flat Invoice | 
TaxSnapper |
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| What it does | Send the invoice. Skip the chasing.
| Simple bookkeeping and tax estimates for UK sole traders
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| Stage | Not given
| Not given
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| Founded | Not given
| Not given
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| Based in | US
| GB
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| Pricing model | Freemium
| Freemium
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| Pricing | 3 invoices per month free, then $2 per invoice. Pro plan: $9 per month or $79 per year for unlimited invoices. Edits, resends and reminders are free.
| Free everyday bookkeeping. Quarterly report: £6.99 per export. Annual report: £9.99 per export.
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| Key features | - Automatic payment reminders on day 3, 7 and 14
- Late fee calculator with interest calculation
- Ready-to-send reminder email templates
- Direct client payments
- Optional Stripe integration for card and bank payments
- Free edits and resends
- Free late fee calculator tool
- Unlimited invoice drafts on free plan
| - Income and expense tracking without bank connection
- Receipt photo storage and attachment to expenses
- Self Assessment and Making Tax Digital report exports
- Income Tax and National Insurance estimates
- Transaction history and record review
- Receipt scanning with automatic field extraction
- Expense categorization
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| What makes it different | - Never touches client payments or takes a percentage
- Automatic reminders reduce payment chasing
- Free late fee calculator included with service
- Simple pricing with no setup fees
| - No monthly subscription - pay only when exporting reports
- Built for sole traders with no accounting experience required
- No bank connection required to use the app
- Stress-tested tax calculations for accuracy
- Can be used alongside an accountant to reduce their time and costs
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 12 | 0 |
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| Referring domains (Majestic) | 3 | 0 |
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6 details filled in for both companies.
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