Stigg
Stigg adds credit reservation and settlement for AI operations days after its agent SDK.
Comparison · Finance
Increase vs InvoiceShelf
A side-by-side editorial comparison of Increase and InvoiceShelf — release velocity, themes, recent moves, and the top alternatives to consider.
Increase vs InvoiceShelf: at a glance
What is Increase?
A banking-as-a-service API that now sells compliance and blockchain rails, not just payments
Increase ships a quarterly newsletter rather than a running changelog, so each entry bundles a quarter of API work. The last three quarters have moved past core payment rails into the surrounding infrastructure: managed compliance, entity onboarding sessions, 3D Secure, push provisioning and IP-restricted API keys. SDK coverage has widened to C#, PHP and Ruby, and the documentation was reworked to be readable by LLMs.
What is InvoiceShelf?
InvoiceShelf 3.0 alphas add bills and suppliers, moving it from invoicing into payables.
Five InvoiceShelf 3.0 alphas shipped in five days. alpha.11 added purchasing (suppliers, bills, supplier credits, payments and refunds) and patched two unauthenticated PHP remote code execution flaws in the Docker image. Later alphas added module API 1.4 with bundled dependencies, EN 16931 e-invoicing with ZUGFeRD / Factur-X hybrid PDFs, a notification bell with automatic payment reminders, and an iOS app headed for TestFlight.
Increase vs InvoiceShelf: editorial side-by-side
Increase
3.8FINANCE
A banking-as-a-service API that now sells compliance and blockchain rails, not just payments
◆ Current state
Increase ships a quarterly newsletter rather than a running changelog, so each entry bundles a quarter of API work. The last three quarters have moved past core payment rails into the surrounding infrastructure: managed compliance, entity onboarding sessions, 3D Secure, push provisioning and IP-restricted API keys. SDK coverage has widened to C#, PHP and Ruby, and the documentation was reworked to be readable by LLMs.
◆ Where it's heading
The arc runs from moving money to operating a bank program end to end. Early quarters added rails (FedNow, Push-to-Card, check transfers); recent ones add the compliance, onboarding and dispute machinery a customer would otherwise build or buy separately. Q2 2026 adds blockchain transfers alongside managed compliance, and flags cross-border payments and lending APIs as next.
◆ Prediction
Expect the cross-border payments and lending APIs named in the Q2 2026 letter to ship as the next quarter's headline, extending the same pattern of absorbing adjacent financial products into the core API.
InvoiceShelf
6.3FINANCE
InvoiceShelf 3.0 alphas add bills and suppliers, moving it from invoicing into payables.
◆ Current state
Five InvoiceShelf 3.0 alphas shipped in five days. alpha.11 added purchasing (suppliers, bills, supplier credits, payments and refunds) and patched two unauthenticated PHP remote code execution flaws in the Docker image. Later alphas added module API 1.4 with bundled dependencies, EN 16931 e-invoicing with ZUGFeRD / Factur-X hybrid PDFs, a notification bell with automatic payment reminders, and an iOS app headed for TestFlight.
◆ Where it's heading
3.0 is turning InvoiceShelf from an invoice generator into a small-business accounting app: payables next to receivables, EU-compliant e-invoices, a module ecosystem, and native mobile apps. The pace suggests the team is finishing features before a beta rather than stabilizing.
◆ Prediction
Expect more alphas filling in accounting pieces and modules built on API 1.4/1.5, with the iOS app appearing on TestFlight; the entries don't show a beta date.
Alternatives to Increase and InvoiceShelf
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 Increase or InvoiceShelf.
Firefly III
Firefly III ships seven develop builds in six days, still with no changelog attached.
Shift4
Shift4 starts its Q4 venue rollout in canary while Customer Hub adds enterprise modifiers.
GOAT.tax
GOAT.tax adds Form 6765 Section G reporting for large R&D credit filers.
Kill Bill
Kill Bill keeps two release lines alive with small invoice-template changes.
Zluri
Zluri is turning SaaS management into identity governance, and Segregation of Duties is the pivot.
See all Increase alternatives → · See all InvoiceShelf alternatives →
Recent activity from Increase and InvoiceShelf
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoInvoiceShelf3.0 alpha.15: iOS app heads to TestFlight
- 5d agoInvoiceShelf3.0 alpha.14: notifications and unpaid-invoice reminders
- 5d agoInvoiceShelf3.0 alpha.13: EN 16931 e-invoices and ZUGFeRD PDFs
- 5d agoInvoiceShelf3.0 alpha.12: modules can bundle libraries and extend screens
- 7d agoInvoiceShelf3.0 alpha.11: purchasing, bills and a PHP RCE fix ⚡
- 1mo agoInvoiceShelf3.0 alpha.10: owners install official modules on managed hosts
- 3mo agoIncreaseManaged compliance and blockchain transfers land in Q2 ⚡
- 6mo agoIncreaseEntity onboarding, 3D Secure and IP-restricted keys
- 10mo agoIncreaseFedNow, Push-to-Card and a Cards Disputes API
- 1y agoIncreaseEvent log filtering and check transfer work
- 1y agoIncreaseFile links, check deposit images, Apple Pay history
- 1y agoIncreaseOAuth applications, lockboxes and exports
Frequently asked questions
What is the difference between Increase and InvoiceShelf?
They serve adjacent needs but don't currently overlap on shipped themes. InvoiceShelf is currently shipping more aggressively (velocity 6.3 vs 3.8), with 1 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 Increase better than InvoiceShelf?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. InvoiceShelf is currently shipping more aggressively (velocity 6.3 vs 3.8), with 1 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 Increase?
Top Increase alternatives in Finance are ranked by recent ship velocity. Browse the "Increase alternatives" section above for the current picks, or visit /alternatives/increase for the full list with editorial commentary on each.
What are the best alternatives to InvoiceShelf?
Top InvoiceShelf alternatives in Finance are ranked by recent ship velocity. Browse the "InvoiceShelf alternatives" section above for the current picks, or visit /alternatives/invoiceshelf for the full list with editorial commentary on each.