Advent Software vs Affirm vs Airbase: Which Is Right for You in 2026?
These three don't belong in the same 'which should I buy' conversation at all — Advent Software is a legacy brand absorbed into SS&C Advent back in 2015 and…
Best for: Finance and operations leaders at mid-market companies who need one platform for AP automation, cards, procurement, and expenses.
At a Glance
Advent Software
Affirm
Airbase
Primary category
Finance
Finance
Finance
Rating
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Pricing model
custom
custom
custom
Starting price
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Free plan
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Free trial
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Platforms
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Team collaboration
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AI features
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Public API
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Standout Differences
Advent Software isn't an active standalone product
SS&C Technologies acquired Advent Software in 2015, and its portfolio accounting, trading, and reporting tools now operate as SS&C Advent — there's no independent Advent Software purchase path today.
Advent Software
Affirm sits at the consumer checkout, not inside a finance team's stack
Affirm is a publicly traded (NASDAQ: AFRM) BNPL lender that shoppers use to split purchases into installment loans, while participating merchants pay a transaction fee — a fundamentally different relationship than a company buying internal finance software.
Affirm
Airbase is the only one built for internal spend management
Airbase, now operating as Airbase by Paylocity, unifies AP automation, corporate cards, procurement, and expense management for a mid-market company's own finance operations — a job neither Advent Software's portfolio accounting nor Affirm's consumer lending touches.
Airbase
Three entirely different buyer personas
An asset manager evaluates SS&C Advent for portfolio operations, an ecommerce merchant integrates Affirm to offer shopper financing, and a finance or ops leader adopts Airbase to control company spend — there's no overlap in who actually signs the contract.
Monthly Installments — 0% to 36% APR 3 to 60 months
Affirm Card — No annual fee Pay now or over time per purchase
Airbase
No individual plan breakdown documented yet.
Pros & Cons
Advent Software
Pros
Deep, decades-long track record in investment management software, dating to 1983
Backed by SS&C Technologies' scale and resources following the 2015 acquisition
Broad functional coverage spanning accounting, trading, compliance, and reporting in one ecosystem
Serves a large, established base of more than 5,000 buy-side firms globally
Continuity of legacy products like Geneva under a larger, well-capitalized parent company
Cons
No longer an independent company, so buyers are evaluating SS&C's broader offering rather than a standalone Advent product
Pricing is entirely custom and not published, requiring a sales engagement to get a quote
Enterprise-grade investment management platforms typically involve significant implementation time and cost
Legacy product naming can be confusing since offerings are now organized by SS&C's functional categories rather than original Advent product names
Affirm
Pros
No late fees are ever charged to consumers
0 percent APR is available on many qualifying purchases
Wide merchant acceptance, including Amazon and thousands of Shopify stores
Total repayment cost is shown transparently before purchase
Publicly traded and regulated, which adds a layer of financial transparency
Cons
Interest rates can reach 36 percent APR on some loans, higher than many credit card promotional rates
Missed payments can be reported to credit bureaus and affect credit scores
Not accepted at every merchant despite the virtual card workaround
Merchant fees of up to roughly 12.5 percent can be costly for smaller businesses
Approval and available terms vary by purchase, so financing is not guaranteed or consistent
Airbase
Pros
Combines multiple spend categories, accounts payable, cards, procurement, and expenses, in one platform
Strong ERP integrations, especially with NetSuite
Now offers combined payroll and non-payroll visibility through Paylocity
Built for mid-market complexity with granular approval workflows and guided procurement
Established track record, having processed roughly 3 billion dollars annually before the acquisition
Cons
No transparent public pricing, requiring a sales demo and custom quote
Now part of Paylocity, so its product roadmap is tied to a larger HCM company rather than an independent focus
Historically positioned above simpler self-serve competitors like Ramp and Brex in price and setup complexity
Customer support and product experience may shift during the ongoing Paylocity integration
Reduced standalone brand visibility since the 2024 acquisition
Use Cases
Choose Advent Software: Asset managers researching legacy Advent capability should redirect to SS&C Advent, its current form under SS&C Technologies.
Choose Affirm: Merchants who want to offer installment financing at checkout, and shoppers who want to split a purchase into payments.
Choose Airbase: Finance and operations leaders at mid-market companies who need one platform for AP automation, cards, procurement, and expenses.
Advent Software
Portfolio accounting for asset managers — Investment management firms use SS&C Advent (formerly Advent Software) tools for day-to-day portfolio accounting and reporting.
Hedge fund trading and compliance — Hedge funds use Advent-derived platforms like Geneva for trading, rebalancing, and compliance monitoring at scale.
Wealth management client reporting — Wealth managers use investor servicing and client portal tools to report performance and holdings to their own clients.
Affirm
Online checkout financing — Shoppers use Affirm to split the cost of an online purchase into manageable payments instead of paying the full price upfront.
Merchant conversion and order value growth — Online retailers offer Affirm at checkout to reduce cart abandonment and increase average order value.
Large purchase financing — Consumers finance higher-ticket purchases like furniture, electronics, or travel using longer Affirm installment terms.
Airbase
Procure-to-pay automation — Finance teams automate purchase requests, approvals, and vendor bill payments in one workflow.
Corporate card spend control — Finance teams issue policy-controlled cards to employees and departments to prevent overspending.
Unified payroll and non-payroll spend visibility — Companies already using Paylocity for HR and payroll add Airbase to see all company spend in one place.
Frequently Asked Questions
Can I still buy Advent Software directly?
No. Advent Software was acquired by SS&C Technologies in 2015 and its portfolio accounting, trading, and reporting products now operate as SS&C Advent. Anyone researching Advent Software's capabilities today should evaluate SS&C Advent's current offering instead.
Is Airbase a competitor to Affirm?
No. They solve unrelated problems — Airbase is a corporate spend-management platform (AP automation, corporate cards, procurement, expenses) that finance teams use internally, while Affirm is a consumer buy-now-pay-later lender that shoppers use at checkout on a merchant's site.
Which of these three would a finance team actually deploy internally?
Airbase. It's purpose-built for finance and operations teams to manage accounts payable, corporate cards, procurement, and expense management in one platform. Advent Software's successor (SS&C Advent) serves investment managers specifically, and Affirm is a checkout-financing product for merchants and shoppers, not an internal finance tool.
Does Affirm compete with Airbase's corporate card feature?
No, there's no overlap. Affirm doesn't issue corporate cards; it's a consumer lending product that merchants integrate at checkout so shoppers can pay in installments. Airbase's corporate cards are an internal spend-control tool for a company's own employees.
Who should evaluate Advent Software's old feature set?
Asset managers and investment operations teams — but they should look at SS&C Advent's current product, since that's what Advent Software's portfolio accounting, trading, and reporting capabilities became after the 2015 acquisition.