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Comparison · Finance
SolidInvoice vs WP Simple Pay
A side-by-side editorial comparison of SolidInvoice and WP Simple Pay — release velocity, themes, recent moves, and the top alternatives to consider.
SolidInvoice vs WP Simple Pay: at a glance
What is SolidInvoice?
SolidInvoice 3.1.3 patches payment settling and clears 12 Symfony advisories.
SolidInvoice, the self-hosted invoicing app, is in a patch cycle on 3.1. The 29 October trio brought custom invoice templates, invitation expiry and a fixed upgrade path with migrations at startup or as a Helm pre-upgrade job. 3.1.3 follows with fixes: invoices paid through the API or MCP are only marked paid once the payment settles, the revenue chart counts each month once, and a Symfony bump clears 12 security advisories.
What is WP Simple Pay?
WP Simple Pay 4.17.4 brings payments and refunds into WordPress, no Stripe tab needed.
The feed's first entry since October 2025, 4.17.4 adds a Transactions page listing every one-time payment with status filters, search by customer email and spreadsheet export, plus refunds from inside WordPress. Earlier releases tracked Stripe's own surface: 4.16 added local payment methods and 4.13 compliance controls. The standout remains 4.14, which removed the paywall on recurring subscription payments.
SolidInvoice vs WP Simple Pay: editorial side-by-side
SolidInvoice
5.0FINANCE
SolidInvoice 3.1.3 patches payment settling and clears 12 Symfony advisories.
◆ Current state
SolidInvoice, the self-hosted invoicing app, is in a patch cycle on 3.1. The 29 October trio brought custom invoice templates, invitation expiry and a fixed upgrade path with migrations at startup or as a Helm pre-upgrade job. 3.1.3 follows with fixes: invoices paid through the API or MCP are only marked paid once the payment settles, the revenue chart counts each month once, and a Symfony bump clears 12 security advisories.
◆ Where it's heading
After the large 3.0 release in June, work has moved to hardening: upgrade paths, packaging (Snap, static PHP builds) and correctness in payments and reporting. The mention of MCP payments shows AI-agent access is already wired into billing, though the entries don't detail it.
◆ Prediction
Expect more 3.1.x patches on packaging and payment edge cases; the entries don't signal what 3.2 will contain.
WP Simple Pay
0.0FINANCE
WP Simple Pay 4.17.4 brings payments and refunds into WordPress, no Stripe tab needed.
◆ Current state
The feed's first entry since October 2025, 4.17.4 adds a Transactions page listing every one-time payment with status filters, search by customer email and spreadsheet export, plus refunds from inside WordPress. Earlier releases tracked Stripe's own surface: 4.16 added local payment methods and 4.13 compliance controls. The standout remains 4.14, which removed the paywall on recurring subscription payments.
◆ Where it's heading
Until now the plugin competed on Stripe coverage and, with 4.14, on access. 4.17.4 points somewhere new: replacing trips to the Stripe Dashboard for daily payment work. That makes WordPress the place a site owner runs payments, not only collects them.
◆ Prediction
Expect the Transactions view to take on more payment operations, alongside continued fast-following of Stripe payment methods. Whether free subscriptions shifted monetization elsewhere isn't visible in these entries.
Alternatives to SolidInvoice and WP Simple Pay
Other Finance products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either SolidInvoice or WP Simple Pay.
Shift4
Shift4 Venue Q4-R2 is on canary venues now, with global release set for November 17.
Payhawk
Payhawk adds SWIFT payment tracking and a DualEntry ledger sync as ERP coverage widens
TaxDome
TaxDome Pipelines now remember your filters, and long task names stop getting cut off.
LNbits
LNbits 1.7.1 follows the urgent 1.7.0 fix by rotating auth keys.
Kolleno
Kolleno is stretching from collections software toward the whole cash cycle.
See all SolidInvoice alternatives → · See all WP Simple Pay alternatives →
Recent activity from SolidInvoice and WP Simple Pay
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoSolidInvoiceSolidInvoice 3.1.3 fixes payment settling, clears 12 advisories
- 15d agoSolidInvoiceSolidInvoice 3.1.0: custom invoice templates, invitation expiry
- 15d agoSolidInvoiceSolidInvoice 3.1.1: post-3.1.0 bug fixes
- 15d agoSolidInvoiceSolidInvoice 3.1.2 fixes the broken in-app upgrade path
- 1mo agoWP Simple PayIntroducing WP Simple Pay 4.17.4: Every Payment at a Glance, Refunds in One Click
- 2mo agoSolidInvoiceInvoice lines now say '1 hour' instead of '1 hours'
- 4mo agoSolidInvoiceRelease 3.0.1
- 1y agoWP Simple PayIntroducing WP Simple Pay 4.16.0: Reach More Customers with New Local Payment Methods
- 1y agoWP Simple Pay[NEW] WP Simple Pay 4.14: Unlock Free Subscription Payments on WordPress ⚡
- 1y agoWP Simple PayStripe Compliance Made Easy & Even More Pricing Flexibility
- 2y agoWP Simple Pay[NEW] WP Simple Pay 4.12.0 Adds Automatic Recurring Subscription Opt- In Setting, and More
- 2y agoWP Simple Pay[NEW] Purchasing Multiple Items at Once in WP Simple Pay 4.11.0 – Increase Average Order Values
Frequently asked questions
What is the difference between SolidInvoice and WP Simple Pay?
They serve adjacent needs but don't currently overlap on shipped themes. SolidInvoice is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is SolidInvoice better than WP Simple Pay?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. SolidInvoice is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Finance products to evaluate alongside.
What are the best alternatives to SolidInvoice?
Top SolidInvoice alternatives in Finance are ranked by recent ship velocity. Browse the "SolidInvoice alternatives" section above for the current picks, or visit /alternatives/solidinvoice for the full list with editorial commentary on each.
What are the best alternatives to WP Simple Pay?
Top WP Simple Pay alternatives in Finance are ranked by recent ship velocity. Browse the "WP Simple Pay alternatives" section above for the current picks, or visit /alternatives/wp-simple-pay for the full list with editorial commentary on each.