HighRadius Alternatives Worth Comparing in 2026

The main alternatives to HighRadius are Esker, Billtrust, Sidetrade, Serrala, BlackLine, Versapay, Tesorio, Emagia, and FIS GETPAID. Upflow and Chaser belong on the list when the real need is collections software rather than a full order-to-cash suite. Rex belongs on the list as a different kind of option.

HighRadius is order-to-cash software. Its public product pages describe a suite for credit, collections, cash application, deductions, and invoice delivery, including uploads to customer AP portals, with pre-built ERP integrations. It describes AI as analyzing data to recommend decisions and to automate routine tasks. The customer's finance team implements the suite and operates it. That is a strong fit for a large team that wants one vendor across the cycle and can staff the rollout. If that is not the job, compare the named options below on what they are, not on a feature grid.

Descriptions below use only what each vendor says on its own public site. They are not rankings, and they leave out pricing, because these vendors do not publish list prices.

HighRadius alternatives at a glance

Sources: vendor sites linked in each section below. Rex: rex.inc.

How to read this shortlist

Two questions sort the list faster than a feature checklist.

• Who does the work? Every name except Rex is software. The customer's team implements it, configures it, and operates it, including where the vendor describes AI taking routine actions. Rex is an AI operations partner. Its AI agents do the collections, cash application, customer portal uploads, and payment reconciliation, and Rex finance experts oversee that work.
• How wide is the product? HighRadius, Esker, Billtrust, Sidetrade, Serrala, BlackLine, Versapay, Emagia, and FIS GETPAID present a broad credit-to-cash or order-to-cash suite. Tesorio is broad as well, with a stronger public emphasis on collections, cash matching, portals, and forecasting. Upflow and Chaser are narrower collections products.

If the question is whether to hand the work to an accounts receivable outsourcing firm, that is a different comparison. See accounts receivable outsourcing vs an AI operations partner.

The shortlist

Rex

Best for: teams that want the receivables work done with them, inside the systems they already use.

Rex is an AI operations partner for order-to-cash. Its AI agents and finance experts run the work together. Agents run collections, cash application, customer portal uploads, and payment reconciliation, following each customer's procedures. Rex supports 130+ customer portals. Finance experts oversee the agents. The customer's team keeps exceptions, approvals, and customer decisions that need a person. Rex is not software the customer's team operates, and it is not an outsourcing firm. Most teams go live in under two weeks. Contact for pricing.

Esker

Best for: large organizations automating source-to-pay and order-to-cash together.

Esker describes itself as a cloud platform for both source-to-pay and order-to-cash. On the receivables side, its public pages cover order management, credit, customer inquiries, invoice delivery, payments, cash application, deductions and claims, and collections. It says the suite connects to ERPs including SAP, Oracle, and Microsoft Dynamics, and that it supports multiple entities, countries, currencies, and languages. It suits a team with process pain across orders and receivables, not only past-due invoices. The customer's team still adopts and runs the platform. See Esker alternatives.

Source: esker.com/solutions/order-to-cash.

Billtrust

Best for: B2B suppliers that want invoicing, payments, and receivables in one product.

Billtrust presents a cash generation platform covering invoicing, payments, credit, collections, and cash application. It says invoice delivery runs through one interface to more than 260 AP portals, and that collections AI points the customer's team at the accounts that matter. Cash application is part of the same platform. It suits a billing-led book, where getting the invoice out and offering a way to pay is the main leak. Collections is one module in that platform, so a team whose only problem is the past-due book should weigh that. The customer's team operates the software. See Billtrust alternatives.

Source: billtrust.com.

Sidetrade

Best for: enterprises that want order-to-cash apps and AI agents in software they govern.

Sidetrade describes an order-to-cash platform with apps for credit, invoicing, collections, disputes, cash application, deductions, analytics, and buyer self-service. It says its Aimie agents carry out repetitive collections, cash application, and dispute work, and escalate sensitive or strategic cases. The platform is modular, so a company can start with one app. It is still software the customer implements and governs. It suits an enterprise that wants that breadth and will run the rollout.

Source: sidetrade.com.

Serrala

Best for: finance teams, especially on SAP, that want AR next to AP and payments.

Serrala describes an AI finance platform for accounts receivable, accounts payable, and payments. It offers cloud, hybrid, or SAP-embedded deployment, and it publishes bill presentment and payment as a way to accelerate collections and offer digital payment. It suits a team that wants receivables in the same platform as payables and payments, particularly where SAP is the system of record. The customer's team adopts the software.

Source: serrala.com.

BlackLine

Best for: controller-led teams that want invoice-to-cash on the BlackLine platform.

BlackLine's invoice-to-cash pages cover e-invoicing and payments, cash application, collections, credit and risk, disputes and deductions, and AR reporting. It describes Verity AI, including collections outreach, as working alongside the finance team so specialists can focus on complex accounts. The same pages tie the product to the data a close team already uses. It suits an organization already running the financial close on BlackLine, or one that wants receivables and the close on one platform. The customer's team operates it.

Source: blackline.com/solutions/invoice-to-cash.

Versapay

Best for: teams whose customers will log in, view invoices, and pay.

Versapay describes a unified invoice-to-cash platform: a digital invoicing portal, collections management, cash application, and B2B payments, including ACH, card, and wire. Customers can view invoices, pay, and manage the account in a branded portal. Versapay also describes automated dunning and basic collections. It suits a book whose customers will actually use the portal. Accounts that never log in still need follow-up from the team operating the software. See Versapay alternatives.

Source: versapay.com.

Tesorio

Best for: teams that want collections, cash matching, and supplier-portal agents in a product they run.

Tesorio describes AI agents across order-to-cash. Its public pages describe a collections agent that drafts follow-ups and extracts payment promises, cash matching against open invoices, a supplier portal agent for portals such as Coupa and Ariba, and cash forecasting. It lists connections to NetSuite, Sage Intacct, Workday, Zuora, Salesforce, and Stripe, and a customer success manager who helps the customer's team set the platform up. The team still runs the product.

Source: tesorio.com.

Emagia

Best for: enterprises evaluating an order-to-cash suite built around named AI agents.

Emagia presents itself as enterprise autonomous finance for order-to-cash. On its public site it names separate agents and products for the finance inbox, cash, accounts receivable collections, and B2B payments (Gia Inbox Agent, Gia AlphaCash, Gia Collect, and GiaPay). It suits an enterprise that wants that suite and will adopt the software.

Source: emagia.com.

FIS GETPAID

Best for: credit and collections teams that want one credit-to-cash system to operate.

FIS describes GETPAID as web-based accounts receivable software for the credit-to-cash cycle. The published modules cover credit risk, collections, collections scoring, cash application, and deduction and dispute management. FIS says AI prioritizes collection work and matches payments, and that the product can be delivered on-premise, as SaaS, or in a private cloud. It suits a team that wants its collectors working in that system. The customer's team operates the software.

Source: fisglobal.com/products/fis-getpaid.

Upflow and Chaser, when a suite is more than you need

These two are collections products. They show up when a team leaves an enterprise shortlist because the pain is follow-up on open invoices. For the enterprise end of that market, see the best AR software for enterprise. If the other option is keeping the work with your own team, see in-house collections vs AR automation.

Upflow describes accounts receivable software for B2B finance teams: collections agents, cash application, a payment portal, and an AP portal agent. Upflow says teams can set those agents from suggestion-only through to autonomous actions. It publishes connections to accounting systems such as NetSuite, Sage Intacct, QuickBooks Online, and Xero. The customer's team works alongside the agents. Source: upflow.io. See Upflow alternatives.

Chaser describes accounts receivable software that chases outstanding invoices, collects payments, and forecasts cash flow, with two-way sync to the accounting system. It suits a team that wants automated reminders and cash-flow visibility in a product its own staff controls. Source: chaserhq.com.

Questions to ask in a demo

Ask each software vendor who acts when nobody clicks approve, and ask Rex the same question in the form of who oversees the agents.

• Walk one past-due account from reminder to cash applied. Which steps does the customer's team still perform?
• A customer replies in free text and disputes a line. Does the product read it and change course?
• Does cash application post back to the ERP, or does someone retype the result?
• For a suite, which modules do you actually need live to move collections, and who configures them?
• For Rex, which procedures do the finance experts follow, and which decisions stay with your team?

Where Rex fits

Rex is an AI operations partner for order-to-cash. Its AI agents and finance experts run the work together. They run collections, cash application, customer portal uploads, and payment reconciliation in the ERP, email, and portals the customer already uses. The customer's team does not get another suite to drive. It keeps the exceptions, the approvals, and the relationships.

That is the honest place for Rex on a HighRadius shortlist. Choose HighRadius, Esker, Billtrust, Sidetrade, Serrala, BlackLine, Versapay, Tesorio, Emagia, or FIS GETPAID when you want software your team will operate. Choose Upflow or Chaser when you want narrower collections software. Choose Rex when you want the routine receivables work done by AI agents, overseen by finance experts, under your own procedures.

Contact for pricing. See how Rex runs collections, cash application, and customer portals with your team.