License & Deployment Mix: 27 tools – 8 OSS, 14 SaaS. (OSS and SaaS counts can overlap when an open-source tool also offers a vendor-hosted edition.)
What Is ERP / Accounting Software?
Enterprise Resource Planning (ERP) systems manage core business processes – accounting, procurement, inventory, manufacturing, HR, and project management – in a single integrated platform. ERP systems are comprehensive but complex.
Accounting software focuses on the financial subset: general ledger (GL), accounts payable (AP), accounts receivable (AR), invoicing, bank reconciliation, tax reporting, and financial statements. Standalone accounting tools are simpler to deploy and maintain than full ERP.
Invoicing / billing platforms are the simplest category: they generate invoices, track payments, and manage client billing. Some grow into full accounting systems over time.
The information on these pages was researched by a combination of human review and large language models. To suggest an addition or correction, please contact us. Prepared by Rhodium Systems Inc., author of the ResorsIT platform — a unified IT operations management platform for IT teams and MSPs that integrates a curated suite of open-source, commercial, and SaaS applications into a single system with shared identity, single sign-on, access control, and a common audit trail. Use this catalogue only as a starting point for your own research, and review any tool carefully against your own requirements before relying on it. Catalogue data version 2026.197.
Comparison
SSO / OIDC Comparison
OIDC is the preferred SSO protocol; the notes below assume an Authentik-class identity provider.
| Tool | OIDC | SAML | LDAP | Authentik Notes |
|---|---|---|---|---|
| ERPNext | Yes* | Plugin | Yes | OIDC via Social Login Key |
| Odoo Community | No | No | Yes | No viable SSO path |
| Dolibarr | Yes | No | Yes | OIDC works with Authentik |
| Tryton | No | Yes | No | SAML IdP |
| Akaunting | No | No | No | Reverse-proxy auth only |
| Invoice Ninja | No | No | No | Reverse-proxy auth only |
| LedgerSMB | No | No | No | PostgreSQL auth only |
| FrontAccounting | No | No | No | No SSO support |
| Kill Bill | No | No | Yes | LDAP via Shiro |
| Odoo Enterprise | Yes* | Yes | Yes | OIDC + SAML via modules |
| SAP Business One | Yes* | Yes | AD | OIDC (FP 2208+) |
| Zoho Books | No | Yes | Yes* | SAML via Zoho Directory |
| QuickBooks Online | No | No | No | No SSO support |
| Xero | No | No | No | No inbound SSO |
| FreshBooks | Yes* | Yes* | No | Unclear documentation |
| Wave | No | Yes* | No | Limited SAML |
| Sage Intacct | No | Yes | No | SAML IdP |
| Oracle NetSuite | Yes | Yes | No | OIDC or SAML |
| SAP S/4HANA | Yes* | Yes | No | OIDC/SAML via SAP IAS |
| Dynamics 365 BC | Yes | Yes | AD | OIDC via Entra ID |
| Acumatica | Yes | Yes | Yes | OIDC or SAML; AD/LDAP |
* = requires module, plugin, or specific version
Best SSO support: Odoo Enterprise (OIDC + SAML), Dynamics 365 BC (native OIDC via Entra ID), Oracle NetSuite (native OIDC + SAML), ERPNext (OIDC via Social Login Key), Dolibarr (native OIDC module)
No SSO: QuickBooks Online, Xero (outbound only), Akaunting, Invoice Ninja, LedgerSMB, FrontAccounting
API Comparison
| Tool | API Type | Auth | Rate Limit |
|---|---|---|---|
| ERPNext | REST | Token/OAuth2 | None doc’d |
| Odoo Community | JSON-RPC | Session | None |
| Dolibarr | REST | API key | None doc’d |
| Tryton | XML/JSON-RPC | Session | None |
| Akaunting | REST | Basic Auth | None doc’d |
| Invoice Ninja | REST v5 | API token | None doc’d |
| LedgerSMB | REST v0 | Session | None |
| FrontAccounting | REST* | API key | None |
| Kill Bill | REST | Basic/API key | None doc’d |
| Odoo Enterprise | JSON-RPC | Session/OAuth | None |
| SAP Business One | REST (SL) | Session/OAuth | None doc’d |
| Zoho Books | REST v3 | OAuth 2.0 | 100/min |
| QuickBooks Online | REST | OAuth 2.0 | 500/min |
| Xero | REST | OAuth 2.0 | 60/min |
| FreshBooks | REST | OAuth 2.0 | Not doc’d |
| Wave | GraphQL | OAuth 2.0 | Not doc’d |
| Sage Intacct | REST/XML | Session/sender | 6,000/day |
| Oracle NetSuite | REST/SOAP | OAuth 1.0a/TBA | 10/sec |
| SAP S/4HANA | OData REST | OAuth 2.0 | Varies |
| Dynamics 365 BC | OData REST | OAuth 2.0 | 600/5min |
| Acumatica | REST/SOAP/OData | OAuth 2.0 | Not published |
* = community module, not core
Accounting Capabilities
| Tool | Double-Entry | Multi-Currency | Bank Recon | Invoicing |
|---|---|---|---|---|
| ERPNext | Yes | Yes | Yes | Yes |
| Odoo Community | Yes | Yes | Manual | Yes |
| Dolibarr | Yes* | Yes | Plugin | Yes |
| Tryton | Yes | Yes | Manual | Yes |
| Akaunting | Yes | Yes | Yes | Yes |
| Invoice Ninja | No | Yes | No | Yes |
| LedgerSMB | Yes | Yes | Manual | Yes |
| FrontAccounting | Yes | Yes | Manual | Yes |
| Kill Bill | No | Yes | No | Yes* |
| Odoo Enterprise | Yes | Yes | Auto | Yes |
| SAP Business One | Yes | Yes | Yes | Yes |
| Zoho Books | Yes | Yes | Auto | Yes |
| QuickBooks Online | Yes | Yes | Auto | Yes |
| Xero | Yes | Yes | Auto | Yes |
| FreshBooks | Yes | Yes | Auto | Yes |
| Wave | Yes | Yes | Auto* | Yes |
| Sage Intacct | Yes | Yes | Yes | Yes |
| Oracle NetSuite | Yes | Yes | Yes | Yes |
| SAP S/4HANA | Yes | Yes | Yes | Yes |
| Dynamics 365 BC | Yes | Yes | Auto | Yes |
| Acumatica | Yes | Yes | Yes | Yes |
* = limited or requires paid tier / plugin
ERP Scope (Beyond Accounting)
| Tool | CRM | Inventory | Manufacturing | HR | Projects |
|---|---|---|---|---|---|
| ERPNext | Yes | Yes | Yes | Yes | Yes |
| Odoo Community | Yes | Yes | Basic | Yes | Yes |
| Dolibarr | Yes | Yes | No | Basic | Yes |
| Tryton | Yes* | Yes | Yes | No | No |
| Akaunting | No | Plugin | No | No | No |
| Invoice Ninja | No | No | No | No | Yes* |
| LedgerSMB | No | Basic | No | No | No |
| FrontAccounting | No | Yes | Yes | No | No |
| Kill Bill | No | No | No | No | No |
| Odoo Enterprise | Yes | Yes | Yes | Yes | Yes |
| SAP Business One | Yes | Yes | Yes | Yes | Yes |
| Zoho Books | Via Zoho | Basic | No | Via Zoho | Yes |
| QuickBooks Online | No | Yes* | No | No | No |
| Xero | No | Plugin | No | No | Yes |
| FreshBooks | No | No | No | No | Yes |
| Wave | No | No | No | No | No |
| Sage Intacct | No | Plugin | No | No | Yes |
| Oracle NetSuite | Yes | Yes | Yes | Yes | Yes |
| SAP S/4HANA | Yes | Yes | Yes | Yes | Yes |
| Dynamics 365 BC | Yes* | Yes | Yes | Via D365 | Yes |
| Acumatica | Yes | Yes | Yes | No | Yes |
* = basic/limited or via separate module
Multi-Company and Multi-Tenant
| Tool | Multi-Company | Multi-Tenant | Consolidation |
|---|---|---|---|
| ERPNext | Yes | Yes | Yes |
| Odoo Community | Yes | Limited | No |
| Dolibarr | Module | No | No |
| Tryton | Yes | No | Plugin |
| Akaunting | Yes | No | No |
| Invoice Ninja | No | No | No |
| LedgerSMB | Separate DBs | No | No |
| FrontAccounting | Separate DBs | No | No |
| Kill Bill | N/A | Yes | N/A |
| Odoo Enterprise | Yes | Yes* | Yes |
| SAP Business One | Yes | No | Yes |
| Zoho Books | Yes* | No | Yes* |
| QuickBooks Online | Separate subs | No | No |
| Xero | Separate orgs | No | Plugin |
| FreshBooks | No | No | No |
| Wave | Yes | No | No |
| Sage Intacct | Yes | No | Yes |
| Oracle NetSuite | Yes | Yes | Yes |
| SAP S/4HANA | Yes | Yes | Yes |
| Dynamics 365 BC | Yes | Yes | Yes |
| Acumatica | Yes | Yes | Yes |
* = paid tier or edition dependent
Deployment and Licensing
| Tool | License | Self-Hosted | Pricing Model |
|---|---|---|---|
| ERPNext | GPLv3 | Yes | Free |
| Odoo Community | LGPLv3 | Yes | Free |
| Dolibarr | GPLv3+ | Yes | Free |
| Tryton | GPLv3 | Yes | Free |
| Akaunting | GPLv3* | Yes | Freemium |
| Invoice Ninja | ELv2 | Yes | Free (self) |
| LedgerSMB | GPLv2 | Yes | Free |
| FrontAccounting | GPLv3 | Yes | Free |
| Kill Bill | Apache 2.0 | Yes | Free |
| Odoo Enterprise | Proprietary | Yes | Per-user |
| SAP Business One | Proprietary | Yes | Per-user |
| Zoho Books | SaaS | No | Per-org tier |
| QuickBooks Online | SaaS | No | Per-tier |
| Xero | SaaS | No | Per-tier |
| FreshBooks | SaaS | No | Per-tier |
| Wave | SaaS | No | Freemium |
| Sage Intacct | SaaS | No | Per-user |
| Oracle NetSuite | SaaS | No | Per-module |
| SAP S/4HANA | SaaS/On-prem | Yes* | Per-user |
| Dynamics 365 BC | SaaS/On-prem | Yes* | Per-user |
| Acumatica | SaaS/On-prem | Yes | Consumption |
* = on-premises option available for enterprise
Digital Signature Support
Relevant where contract and proposal signing is required.
| Tool | Built-in | Integrations |
|---|---|---|
| ERPNext | No | DocuSign, Adobe Sign plugins |
| Odoo Community | No | OCA e-signature module |
| Dolibarr | No | DocuSign module available |
| Tryton | No | None documented |
| Akaunting | No | None documented |
| Invoice Ninja | Yes* | Built-in quote approval |
| Odoo Enterprise | Yes | Native Sign app |
| SAP Business One | No | DocuSign integration |
| Zoho Books | Via Zoho | Zoho Sign integration |
| QuickBooks Online | No | DocuSign via app store |
| Xero | No | DocuSign, Adobe Sign apps |
| Oracle NetSuite | No | DocuSign SuiteApp |
| SAP S/4HANA | No | DocuSign, Adobe Sign |
| Dynamics 365 BC | No | DocuSign, Adobe Sign |
| Acumatica | No | DocuSign, Adobe Sign |
* = limited (quote/proposal acceptance, not full e-signature)
Note: Odoo Enterprise has a native Sign app for document e-signatures. Most other tools rely on third-party integrations (DocuSign, Adobe Sign, Yousign, SignRequest).
Tools
29 tools.
Acumatica Cloud ERP
Acumatica is a cloud-native ERP platform targeting the mid-market. Its key differentiator is consumption-based licensing – pricing is based on transaction volume and resource usage, not user count.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC
Akaunting
Akaunting is a modern, web-based accounting application designed for small and medium-sized businesses and freelancers.
License: GPL-3.0-only (OSS) · Kind: web · Deploy: native, saas · SSO: none
Axelor
Open-source low-code ERP/CRM platform with 30+ integrated apps on Axelor Open Platform; Java with PostgreSQL.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, saas · SSO: none
Evaluated under CRM / SFA.
Axelor ERP
Axelor is an open-source, low-code ERP platform with 30+ integrated business applications spanning accounting, purchasing, inventory, manufacturing, HR, CRM, and project management, plus a BPM engine.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none
Dolibarr
Open-source ERP/CRM suite for SMBs; modular PHP architecture; stronger as an ERP than a dedicated CRM.
License: GPL-3.0-or-later (OSS) · Kind: web · Deploy: docker, native, saas · SSO: none
Evaluated under CRM / SFA.
Dolibarr ERP/CRM
Dolibarr is a modular open-source ERP/CRM designed for small and medium businesses, freelancers, and associations. First released in 2003, it emphasizes simplicity and ease of deployment – you enable only the modules you need.
License: GPL-3.0-or-later (OSS) · Kind: web · Deploy: native, saas · SSO: OIDC
ERPNext
ERPNext is a comprehensive open-source ERP built on the Frappe framework. Originally created by Frappe Technologies (India), it covers accounting, HR, manufacturing, inventory, CRM, projects, and asset management in a single integrated plat…
License: GPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: OIDC
ERPNext CRM Module
CRM module of the ERPNext suite on the Frappe framework; tight integration with the rest of the ERPNext business apps.
License: GPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, saas · SSO: OIDC, SAML
Evaluated under CRM / SFA.
FreshBooks
FreshBooks is a cloud accounting platform designed primarily for freelancers, service-based businesses, and small agencies.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: OIDC
FrontAccounting
FrontAccounting (FA) is a web-based double-entry accounting system covering the full ERP chain: general ledger, accounts receivable, accounts payable, inventory, manufacturing (BOM/assembly), fixed assets, and financial reporting.
License: GPL-3.0-only (OSS) · Kind: web · Deploy: native, saas · SSO: none
GnuCash
GnuCash is a free, open-source double-entry accounting application that has been actively developed for over 20 years.
License: GPL-2.0-only (OSS) · Kind: desktop · Deploy: native, package · SSO: none
Invoice Ninja
Invoice Ninja is a feature-rich invoicing, quoting, expense management, and time-tracking platform built on Laravel.
License: LicenseRef-Elastic-2.0 (source-available) · Kind: web · Deploy: native · SSO: none
Kill Bill
Kill Bill is an open-source subscription billing and payments platform designed for companies that need to manage recurring billing, subscription lifecycle, payment processing, and usage-based billing at scale.
License: Apache-2.0 (OSS) · Kind: web · Deploy: native · SSO: OIDC
LedgerSMB
LedgerSMB is a serious, full-featured double-entry accounting and lightweight ERP system for small to mid-sized businesses.
License: GPL-2.0-only (OSS) · Kind: web · Deploy: native, saas · SSO: none
Microsoft Dynamics 365 Business Central
Microsoft Dynamics 365 Business Central (D365 BC) is Microsoft’s cloud ERP for small and mid-sized businesses.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC
Microsoft Dynamics 365 Sales
Microsoft’s enterprise CRM tightly integrated with Azure / Entra ID; common in larger MSP and enterprise customer environments.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML
Evaluated under CRM / SFA.
Odoo Community Edition
Odoo Community Edition is the open-source core of the Odoo ERP platform. With 15+ years of development and 30,000+ community apps on the Odoo App Store, it is one of the most widely deployed open-source ERP systems.
License: LGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: OIDC, SAML
Odoo CRM
CRM module of the Odoo ERP suite (Community Edition); Python + PostgreSQL; integrates tightly with the rest of Odoo.
License: LGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, saas · SSO: OIDC, SAML
Evaluated under CRM / SFA.
Odoo Enterprise
Odoo Enterprise is the commercial edition of the Odoo ERP platform, built on top of the LGPLv3 Community Edition (see odoo.md).
License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: SAML
Oracle NetSuite
Oracle NetSuite is the leading cloud ERP platform for mid-market companies. Originally founded as NetLedger in 1998 (one of the first cloud software companies), it was acquired by Oracle in 2016.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC
QuickBooks Online
QuickBooks Online (QBO) is the most widely used SMB accounting platform globally, particularly dominant in the North American market.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none
Sage Intacct
Sage Intacct is a cloud-native financial management platform designed for mid-market organizations. It is widely regarded as the leading cloud accounting system for multi-entity, multi-currency, and dimensional reporting use cases.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none
SAP Business One
SAP Business One (SAP B1) is SAP’s ERP solution for small and mid-sized businesses. Unlike SAP S/4HANA, which targets large enterprises, B1 is designed for companies with 5–500 employees.
License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: OIDC
SAP S/4HANA Cloud
SAP S/4HANA is SAP’s flagship enterprise ERP suite, the successor to SAP ECC (R/3). Built exclusively on the SAP HANA in-memory database, S/4HANA delivers real-time analytics embedded into transactional processes.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC
Tryton
Tryton is a modular open-source ERP framework with a strong double-entry accounting core, covering sales, purchasing, inventory, and manufacturing via XML-RPC/JSON-RPC and a PostgreSQL backend.
License: GPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: SAML
Vtiger (Invoicing / Billing)
Vtiger is primarily a CRM platform, but its commercial Cloud edition and Community Edition include invoicing, purchase order, and basic inventory modules. These provide order-to-invoice workflow rather than full accounting.
License: LicenseRef-VPL (source-available) · Kind: web · Deploy: native · SSO: OIDC, SAML
Wave
Wave is a free cloud accounting and invoicing platform designed for freelancers, sole proprietors, and very small businesses.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none
Xero
Xero is a cloud accounting platform popular in the UK, Australia, New Zealand, and increasingly in North America.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none
Zoho Books
Zoho Books is a cloud accounting platform for small and mid-sized businesses, offering double-entry accounting, invoicing, expense tracking, bank reconciliation, localized tax compliance, and a REST API.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none
