Why Topsort replaced Chargebee with Sequence

June 2025

AdTech

API

15%

Revenue leakage reduction from error-free billing

67%

Reduction in engineering time spent on monthly billing

<4 weeks

Fully migrated from Chargebee within 1 month

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Prior to using Sequence, we were always spending long hours manually calculating our invoices, which can be prone to errors. Admittedly, we have a fairly specialized pricing set up - minimums, complex usage data, tiered pricing, milestone-based billing. While Chargebee could fit other subscription models, our specific B2B setup introduced challenges it wasn’t designed to address out of the box. Since adopting Sequence, these manual input requirements have been largely reduced, mainly because we can model any pricing scenario in the Sequence billing module. As CTO, I also love that our engineering team doesn't need to get involved in the billing process anymore.

Francisco Larrain, CTO / Co-Founder

Topsort is the leading advertising infrastructure platform for retailers in 40+ countries.

E-Commerce

Industry

100-150

Company Size

2021

Founded

$28.5M

Funding Amount

Topsort's finance team would spend the first week of every month wrestling with spreadsheets to calculate and bill for their complex, usage-based contracts with tiered percentage fees, milestones, and minimums. Chargebee supported Topsort’s initial billing needs, but as Topsort scaled and pricing models grew more complex, it became less aligned with their evolving requirements. They needed a solution to streamline invoicing for their custom contracts without extensive manual work. After a thorough evaluation, Francisco Larrain (CTO/Co-founder) and Jason Liao (Sales & RevOps Lead) chose Sequence to reduce time spent on billing runs, eliminate revenue slippage, and create a scalable billing workflow supporting $10m+ in ARR.

The Challenge

Reduce revenue leakage caused by highly complex B2B contracts
Managed migration service from Chargebee in <4 weeks
Remove engineering involvement in monthly billing process

“We used to rely on our engineering team for sending multiple usage data reports monthly, which we then use a messy combination of Chargebee + Spreadsheets to calculate the invoice. There were always mismatches, caused primarily by advanced pricing tiers and minimums for each customer.

Beyond the reduction in revenue leakage which has been a huge win. We're regularly in competitive deals and need to be flexible on pricing terms to win deals. From a RevOps perspective, I needed to give the sales folks full confidence that we can bill accurately for any pricing model / custom contract term to go to market with.”

- Jason Liao, Sales & RevOps Lead

The Solution

Flexible pricing engine to automate billing for custom, usage-based contracts
Topsort uses Sequence billing schedules to automate invoicing for their complex contracts which include a mix of platform fees (charged in advance), usage-based products (charged in arrears), free trials, milestones, usage minimums, and tiered volume rates. The flexibility of Sequence has helped automate the billing process, reducing invoicing mistakes and saving their finance team 4 days per month on month end close.

Dedicated Chargebee migration team for a fast and frictionless transition
The Sequence implementation team took on all the work to move 75+ customers and subscriptions from Chargebee into Sequence in less than 4 weeks. From the moment Topsort signed, our migration team took over and ran the process end to end, stopping only for a quick review before activating all billing subscriptions in time for month end billing.

Powerful API for automated usage ingestion and invoice generation
The Sequence usage API allows Topsort to automatically send usage data on a daily basis. With custom metrics applying contract-specific pricing rules, Sequence automatically generates accurate invoices with 10+ usage-based products, cutting billing time from 5 days to 3 hours per month, and reducing revenue slippage by 17% since onboarding.