Invoice Ninja alternative for agency billing
Invoice Ninja offers hosted plans and self-hosted software. Its v5 source uses Elastic License 2.0, so this review calls it source-available rather than unrestricted open source. ABH is a narrower hosted workspace for tracked-work billing and external receipt records.
Short answer
ABH may suit a small agency that wants workspace subscriptions, client paperwork and Pro included-hours retainers while collecting money elsewhere. Invoice Ninja is the stronger fit for a payment portal, scheduled invoices or a self-hosted deployment. Its Free plan may also suit a solo business with more clients or invoices than ABH Free allows. Compare the workflow, account users and operating responsibilities before choosing.
Free includes 1 client, 1 project, 20 tracked hours per month, 3 invoices per month, 1 user and an invoice watermark. Client documents require Starter or Pro; retainer management requires Pro. Collect client payments elsewhere.
Invoice Ninja and ABH: selected workflows
| Workflow | ABH | Invoice Ninja |
|---|---|---|
| Time and invoices | Logged work can support invoice lines and PDFs. [ABH-FEATURES] | Projects and billable time are listed on hosted plans. [S1] |
| Collection and access | External receipts recorded manually; public links, no client login portal. [ABH-LIMITS] | Hosted plans list gateways, partial payments and an invoice/payment portal. [S1] |
| Recurring work | Pro retainer periods use manual generation; no scheduled invoices or rollover. [ABH-RETAINERS] | Hosted recurring invoices and auto-billing listed; capped-hour/rollover parity unverified. [S1] |
| Connections and currencies | No customer API, accounting integration or currency conversion today. [ABH-LIMITS] | Pro lists third-party API integration; hosted features list currency conversion. [S1] |
| Agency paperwork | Starter/Pro include proposals, e-sign contracts, pipeline and onboarding. [ABH] | Quotes documented; e-sign contracts, sales pipeline and approval parity unverified. [S1] |
| Cost model | Flat workspace pricing, Free/Starter seat caps and unlimited Pro users. [ABH] | Hosted Free has five clients; Enterprise prices vary by account users. [S1, S2] |
| Hosting and license | Hosted workspace; no self-hosted customer edition offered. [ABH-LIMITS] | Self-hosted v5 source is ELv2, with conditions and operator responsibilities. [S3, S4] |
Sources: ABH: ABH plans and seat caps, checked 2026-10-14, ABH-FEATURES: Time tracking and invoicing, checked 2026-10-14, ABH-RETAINERS: Pro retainer workflow, checked 2026-10-14, ABH-LIMITS: ABH scope and integration limits, checked 2026-10-14, S1: Hosted pricing and features, checked 2026-10-14, S2: 2026 rates and user bands, checked 2026-10-14, S3: Self-hosting terms, checked 2026-10-14, S4: v5 license at pinned license commit, checked 2026-10-14.
Where ABH may fit better
Consider ABH when you collect client money externally and want the owner to review time, issue invoices and reconcile receipts. [ABH-FEATURES, ABH-LIMITS] Read proof-backed invoices and time tracking and invoicing. Payment entries record receipts; they do not move funds or guarantee collection.
Starter and Pro include pipeline, proposals, e-sign contracts, onboarding and templates. Pro adds flat-fee/capped-hours retainers. Finance, growth, onboarding and template data are Owner-only. [ABH, ABH-RETAINERS] Evaluate owner and logging roles together. Invoice Ninja contract, pipeline and approval parity is unverified, so no exclusive-feature claim is made.
Read Invoice Ninja vs FreshBooks when hosted accounting depth and operating a source-available deployment are competing requirements.
Where ABH is weaker today
Pricing snapshot: hosted and self-hosted costs
ABH workspace subscriptions are Free USD0, Starter USD9.99/month and Pro USD19.99/month. Free allows one user, client and project, 20 tracked hours and three invoices monthly, with a watermark. Starter allows three users; Pro allows unlimited users. Paid plans list unlimited clients, projects, hours and invoices. Starter adds client workflows; Pro adds retainers and finance tools. Public catalog checked October 14, 2026; no annual discount asserted. [ABH]
Invoice Ninja publishes hosted Pro at $14/month for one user or $140 paid annually. Enterprise bands include two users at $18/month or $180/year, five at $32 or $320/year, and ten at $54 or $540/year. Larger bands reach 100 users at $300/month or $3,000/year. The dollar currency designation, taxes and gateway fees remain unverified here. [S2] Compare the selected user band and commitment, not an annual total presented as a monthly offer.
Its pricing update lists self-hosted white-label removal at $40/year, separately from hosted subscriptions. [S2] Infrastructure, maintenance, backups and processor costs need a separate estimate; base self-host subscription price and support entitlement remain unverified in these sources. Invoice Ninja Free includes five clients and unlimited invoices, a documented allowance advantage over ABH Free. [S1] ABH is not cheaper for every use case, and workspace pricing alone does not establish total savings.
Hosting control and the v5 license
Self-hosting gives an operator deployment control and responsibility for its data. [S3] Assign updates, access controls, restore tests and incident recovery before choosing a server. This checklist is operational advice, not a measured setup-effort or reliability claim. White-label licensing renews annually and is non-refundable under its terms.
The pinned v5 license grants use, modification and redistribution subject to conditions. ELv2 restricts offering substantial software functionality as a hosted/managed service, bypassing license-key controls and removing protected notices. [S4] White-label purchase does not establish unrestricted resale rights. Check the exact release and terms for your intended deployment; this is a description of the published license, not legal advice or a licensing decision.
Who should pick Invoice Ninja
Pick Invoice Ninja for client gateway payments through an invoice portal or scheduled recurring invoices. [S1] A business issuing the same monthly charge should assess that connected process first. ABH requires external collection and manual invoice generation.
Pick Invoice Ninja when deployment control is a requirement and you can manage the installation and data. [S3] A solo operator within its Free cap should compare allowances carefully. Hosted convenience and self-hosted control are separate choices.
Switching and reconciliation checks
ABH supports client and project CSV import, not a promised import of Invoice Ninja invoices, payments, contracts or time histories. Check exports and retain source records. Test a fictional draft, separating invoice value, external receipts and outstanding balance. Avoid billing the same deposit or milestone twice.
Use deposit and milestone invoicing, payment terms and the late invoice follow-up workflow to define who checks receipts and contacts a client. These guides describe operational steps, not automatic payment collection. Review integration limits before relying on another system to reconcile accounts.
Frequently asked questions
Is Invoice Ninja v5 unrestricted open source?
Its source is available under Elastic License 2.0 with conditions. Check the exact release license and hosting terms; unrestricted redistribution or resale is not asserted.
Is self-hosting free of operating costs?
No total-cost claim is made. Budget infrastructure and maintenance separately, and check support and the recurring white-label charge if needed.
Which Free plan has the larger invoice allowance?
Invoice Ninja lists five clients and unlimited invoices. ABH Free lists one client and three invoices per month, alongside time and project caps.
Does ABH have a client payment portal?
No. ABH provides public document links and manual external receipt records. Collect money elsewhere; Polar bills only your own ABH subscription.
Can Pro schedule my recurring invoices?
No. ABH Pro supports retainer usage but invoice generation is manual. Scheduled recurrence and rollover are not available today.
Try a draft that reflects your billing routine
Free includes 1 client, 1 project, 20 tracked hours per month, 3 invoices per month, 1 user and an invoice watermark. Client documents require Starter or Pro; retainer management requires Pro. Collect client payments elsewhere.