For years, Enzyme was the de facto standard for testing React applications. Originally built by Airbnb in 2015, Enzyme makes it easy to assert, manipulate, and traverse the output of React components. The last official release of Enzyme came after React 16 was launched in 2017, but even then did not fully support all React 16 features. Ongoing support for Enzyme shifted to the open source community with React 17. However, the creator of the community-maintained Enzyme adapter announced that he would not be offering an updated version for React 18. This effectively marked the end of the Enzyme project, as it would prevent users from leveraging new features like React 18’s concurrent mode.

On October 20, 2025, HubSpot experienced a significant service disruption affecting multiple product features due to a severe AWS outage in the us-east-1 region. While our infrastructure remained intact, the widespread nature of the cloud provider failure impacted both our services and critical third-party vendors we rely on. We've completed a thorough analysis of this incident and are implementing comprehensive improvements to strengthen our resilience against future cloud provider disruptions.

​​Most software developers have heard the maxim, “it’s never a compiler bug,” and its companion, “it’s never a hardware bug.” But if you investigate enough bugs, you’ll eventually find an exception to this rule, and that’s what we found recently at HubSpot. I discovered how a hardware bug was affecting our users’ experience.

This post is intended to be the first in a series about empowering product, UX, and engineering teams with AI. We’re going to focus on how we’ve approached and scaled the use of AI in the context of writing code.

Your business has evolved, and your tools should too. Our refreshed interface reduces cognitive load with thoughtful simplification and feature curation. This helps your team work more efficiently while maintaining all the powerful functionality you rely on. This is the foundation for your next decade of growth.

On Thursday, August 7, 2025, between approximately 1:45 PM EDT and 2:05 PM EDT, HubSpot customers experienced widespread errors when accessing CRM records. With approximately 95% of requests failing at peak impact, this resulted in “All is not lost” errors across all record pages, object previews, and workspace preview sidebars.

Authors: Rishav Paul , William Hou , Chris Connors , and Sejal Parikh. ----------

On Thursday, March 27, 2025, between approximately 15:00 UTC and 17:50 UTC, some HubSpot customers experienced delays in sending emails, including marketing emails, test sends, signup verifications, and 2FA (two-factor authentication) emails. This issue only affected a segment of our North American infrastructure.

HubSpot allows users to connect their third-party inboxes (such as Outlook) to sync emails and send 1:1 messages. When a connection error occurs, HubSpot classifies it as either recoverable or permanent:

When we’re hiring designers we have different interview types that they go through. We’re trying to assess how designers apply craft, collaborate, manage ambiguity, leverage data for decisions, put the customer first, take ownership, and drive results. Different interviews focus on specific aspects, allowing the interviewers to deep dive into a topic.