Pleo vs Ariba vs Airbase for Procurement & P2P

For a $250M technology company requiring SOC 2 Type II as a baseline compliance gate, SAP Ariba satisfies this requirement through a dedicated, regularly issued audit program documented on SAP's Trust Center. SAP Ariba and SAP Business Network has prepared a SOC 2 Type 2 audit report by an independent third-party accountant, covering the audit period April 1, 2024 to March 31, 2025, and the trust principles Security, Availability, Processing Integrity, and Confidentiality. The report is restricted in use, and a copy is available to all SAP customers and prospects with a non-disclosure agreement in place. To bridge any gap between the end of the audit period and the current date, SAP Ariba and SAP Business Network regularly provides a bridge letter covering the period April 1 through July 31, 2025. Reports are accessible on demand via the SAP Trust Center or through an account executive.

For a $250M technology company whose CFO requires audit-ready compliance documentation, Airbase (now operating as part of Paylocity) publishes a dedicated security policy page at airbase.com/legal/security-policy that confirms both annual SOC 2 Type II attestations and ISO 27001:2022 certification. The SOC 2 Type II attestation is performed by reputable, independent audit firms on an annual cadence and covers controls related to security, confidentiality, and availability — the three trust service criteria most relevant to a procurement platform handling vendor and spend data. The same commitment is confirmed on the Airbase features/security page and corroborated on paylocity.com/company/protecting-our-clients. Post-acquisition, the Airbase spend management module is covered under the combined Paylocity compliance program, meaning the buyer receives a single, unified attestation rather than a legacy standalone Airbase report. The buyer's audit team can request the full Type II report through Paylocity's Trust Center (trust.paylocity.com), which uses third-party auditors to regularly assess procedures, processes, controls, and infrastructure.

For a $250M technology company with US offices and Canadian operations requiring audit-ready compliance documentation, Pleo does not appear to hold a SOC 2 Type II certification. Pleo's dedicated Trust and Security page (pleo.io/en/trust-and-security) enumerates its third-party assessments and certifications as: PCI-DSS, Google's Cloud Application Security Assessment (CASA), HackerOne Bug Bounty penetration testing, and a CAIQ Self-Assessment, with GDPR compliance rounding out the framework. Pleo undergoes rigorous third-party assessments and audits covering PCI-DSS, Google's CASA, HackerOne Bug Bounty penetration testing, and a CAIQ Self-Assessment, as well as GDPR adherence. SOC 2 Type II is not listed among these certifications, and no Pleo trust portal (Vanta, Drata, SafeBase, or equivalent) surfaced in web searches. This is consistent with Pleo's European fintech roots: Pleo is in full compliance with the new regulatory landscape and is committed to helping customers comply with GDPR through robust privacy and security protections. The compliance posture is EU-centric and does not include the AICPA-audited attestation that US enterprise buyers require.

For a company currently running 35% maverick spend with no procurement system, SAP Ariba Invoice Management treats 'non-PO invoice' as a first-class, named document type rather than an error state. When an invoice arrives (via SAP Business Network, email, or manual entry), all invoices generate a corresponding invoice reconciliation document automatically, and the invoice gets matched against any related purchase orders, contracts, or receipts, with data compared to check for any discrepancies known as invoice exceptions. If no PO match is found, the invoice is classified as a non-PO invoice and enters a separate approval path: administrators can configure routing to individuals, groups, and work queues, and create work queues by invoice type, supplier group, and spend category. Automated exception handling and capture of negotiated terms are built in, and the automation strengthens contract, non-PO, or PO compliance. The upstream Guided Buying layer adds a preventive dimension: users can see immediately if a purchase would violate a policy, rather than finding out after submitting a request, and administrators can set rules that either allow or disallow the exception. Together, these stages cover both upstream PO enforcement (Guided Buying, stage 1) and downstream non-PO invoice detection and routing (Invoice Management / Invoicing, stage 2).

For a $250M tech company where 35% of spend currently bypasses POs entirely, Airbase's AP Automation module addresses part of this requirement through its Invoice Inbox and PO matching workflow: when an operator opens an invoice from the Bills Payments > Inbox to create a bill, Airbase lists all open POs on record for that vendor and the operator clicks 'Match' to link them. As the product page states, the system is designed for 'ensuring every invoice is tied to the correct PO and receipt.' However, the documented mechanism is operator-initiated matching during bill creation, not an automated flag or hold triggered at ingestion for invoices that arrive without any PO reference. The help center article confirms the workflow is: find the invoice, select the vendor, then choose a PO to match — meaning a bill can be created and routed for approval without a matched PO if the operator skips that step. Airbase's Guided Procurement module enforces PO creation upstream (before purchase), guiding employees on 'whether to create a PO or a virtual card for payment,' which partially closes the maverick spend gap on the front end but does not intercept invoices that arrive from outside that workflow.

This $250M US technology company needs every invoice arriving without a matching PO to be automatically flagged or held before payment. Pleo does have a purchase order module: the system will automatically attempt to match invoices to linked purchase orders, and if there is a mismatch, a warning is surfaced for review and correction. However, this mismatch warning only fires when an invoice is already associated with a PO; there is no documented mechanism that detects or holds invoices submitted with no PO reference whatsoever, which is the core of maverick spend tracking. More critically, US customers are not able to pay supplier invoices through Pleo, meaning the entire AP invoice workflow (including the PO module) is unavailable to this US-based buyer. The platform's primary mechanism for spend control is card-based: smart company cards with individual spending limits handle purchases while paperwork is sorted automatically, which is an upstream card-authorization stage, not an invoice-to-PO matching or maverick spend detection layer.

For this $250M technology company running NetSuite and needing a fallback integration layer beyond any native connector, SAP Ariba provides a mature, publicly documented REST API surface accessible via the SAP Ariba Developer Portal and the SAP Business Accelerator Hub. Developers register an application, obtain OAuth 2.0 client credentials, and then call REST endpoints hosted at openapi.ariba.com across procurement domains including requisitions, purchase orders, invoicing, sourcing, and operational reporting. The fact sheet's supporting tier explicitly references the ability to 'connect supplier systems, orchestrate approval workflows, and build custom extensions with low-code tools' and to 'publish your own RESTful APIs that call your internal systems' via the Developer Portal. In practice, REST APIs cover read/reporting operations (Operational Reporting for Procurement, sourcing views, document approval) and write operations such as requisition creation and updates, meaning the buyer's team could build a NetSuite-to-Ariba sync for any data object not covered by a pre-built connector. Note that the write-side API coverage is less symmetric than read coverage: as documented by third-party integrators, Ariba's REST APIs are well-suited to pulling data outbound, while some inbound write operations (e.g., requisition updates) still rely on legacy SOAP/cXML services alongside the REST layer.

For this $250M technology company running NetSuite with custom workflows that may fall outside Airbase's native connector coverage, Airbase offers a named ERP Integration API as a distinct, documented integration pathway. This option leverages Airbase's ERP Integration API for a tailored integration built by the buyer's team or by an Airbase-certified partner, and Airbase provides comprehensive documentation to guide a successful integration. This API sits alongside, not instead of, the native NetSuite connector: the API acts as a data intermediary between software products like the buyer's ERP and Airbase, controls what data is delivered and in what format, and gives maximum customizability to map data from Airbase into the ERP however preferred, including the ability to enrich data from a secondary source before syncing. The integration layer is explicitly positioned for buyers with non-standard requirements: clients with unique requirements can take advantage of APIs to build custom solutions tailored to their exact needs and specifications. The buyer's NetSuite instance is already a first-class target: the buyer can integrate Airbase with their ERP using Airbase's simple-to-use API.

For a $250M tech company trying to build custom NetSuite integrations beyond Pleo's native connectors, Pleo does offer a documented REST API at developers.pleo.io with OAuth 2.0 and API key authentication, a sandbox environment, and a webhook subscription system. The API uses OAuth 2.0 (client credentials and authorization code flows), accessible by registering an application in the Pleo Developer Portal, and exposes a REST endpoint at `https://external.pleo.io/v0`. The documented API surface covers an Export API (exporting accounting entries to an external ERP/accounting system), a Tags API, a Tax Code API, a Webhook Subscriptions API, and a Vendors API for syncing vendor records with an external ERP. The webhook system supports JWT/OAuth or API key authentication and delivers event-driven notifications to subscriber endpoints. However, this API is scoped entirely to expense/card transaction objects, accounting export, and vendor record sync; there are no documented endpoints for PO creation, PO approval lifecycle, requisition management, or invoice approval state changes -- the procurement workflow objects this buyer needs to bridge into NetSuite. Additionally, the current API set has been marked as deprecated, with no new features being added and access to be fully revoked during 2026, while a replacement API is still under development.

For a $250M technology company whose $60M indirect spend includes significant professional services (IT, consulting, marketing agencies), SAP Ariba's Services Procurement module addresses this requirement through two complementary mechanisms. First, the Service Entry Sheet (SES): a service PO is issued, and once services are rendered, the supplier creates an SES via SAP Business Network specifying service start and end dates, line items rendered, and quantities; the SES is then routed through a buyer approval workflow before invoice matching can proceed, with the approved SES serving as the 'receipt' leg of a 3-way match instead of a physical goods receipt. <cite index='11-4,11-5'>Buyers configure either a 2-way or 3-way match; the 3-way option requires an additional record 'such as a goods receipt or an approved service entry sheet' before an invoice can reconcile. Second, for milestone-driven engagements (e.g., a fixed-fee consulting project with deliverable checkpoints), <cite index='21-3,21-4,21-5,21-6'>Ariba supports 'no-release contracts or blanket purchase orders with milestones,' where milestones represent dates by which a service must be provided and the supplier invoices against the contract and milestone on the due date; this mechanism is explicitly designed for IT projects such as web design, consulting, and deployments. For recurring retainers (time-based), <cite index='20-1,20-2,20-5'>Ariba categorizes service procurement as 'planned' or 'unplanned,' with SES creation for unplanned services requiring the supplier to manually enter service start and end dates and the child line items utilized. The Approvables Reference Guide also documents 'milestone trackers' as a distinct approvable object that triggers email notifications to the milestone verifier and is always created for milestone items. This places Ariba firmly at receipt confirmation (stage 4 of the pre-processing journey), not merely PO matching.

For a $250M technology company whose indirect spend is dominated by IT and professional services engagements, Airbase supports three-way matching through an invoice-PO-receipt workflow, but the receipt leg for services relies on human attestation rather than a dedicated time-period or milestone-tracking mechanism. When goods or services are received, a goods receipt note is created confirming arrival and quantity; for services specifically, the person who ordered the services verifies that what was received was in accordance with contract deliverables. Airbase's Workflow Builder, launched in 2021, routes different spend request types to finance, IT, legal, or other business groups for review, approval, sign-off, or observation, and the 3-way PO matching feature matches POs, invoices, and item receipts to ensure compliance and create a complete audit trail in NetSuite. Airbase offers 3-way matching in partnership with NetSuite, keeping PO processes aligned with an up-to-date ERP. This means the receipt document in the three-way match is an item receipt originating in NetSuite, not a native Airbase milestone-completion or billing-period confirmation screen. No documentation was found describing a structured milestone-attainment gate (e.g., mark Phase 2 deliverable complete before releasing invoice) or a time-period-based confirmation (e.g., confirm monthly retainer hours) as a distinct product feature within Airbase itself.

For this $250M technology company, which spends heavily on IT, professional services, and marketing, the ability to formally confirm that services were rendered before releasing payment is a core control. Pleo's PO module (available only on the Beyond plan) allows a reviewer to approve a PO before spend occurs, and then the system automatically attempts to match an inbound supplier invoice to that linked PO, surfacing a warning if there is a mismatch. However, the matching flow stops at a two-way PO-to-invoice comparison followed by a configurable approval workflow: there is no documented service receipt stage, no milestone checkpoint that a project owner must mark complete, and no time-based billing-period attestation screen between PO creation and invoice approval. Pleo's own documentation on three-way matching characterizes the receipt leg as 'goods receipt verification,' confirming the mechanism is oriented toward physical delivery rather than intangible service confirmation.