Founder & CEO, Darwin

Sergey Kisly

Marketing Measurement
Data Governance
Darwin Flux

Sergey Kisly is the Founder and CEO of Darwin, where he leads the company's vision across web, data and AI engineering for B2B marketing teams. He focuses on building systems that help marketing leaders trust their data and make confident decisions.

His expertise includes data governance, data readiness, privacy and consent management, dashboard architecture, and the evaluation of marketing and AI tools at the vendor level. Sergey approaches marketing challenges through a systems lens, identifying where reporting logic, tracking infrastructure and brand systems break down as companies scale.

Sergey writes about data governance, privacy and consent, data visualization, tool and vendor comparisons, and brand systems for B2B SaaS companies. His work helps marketing teams build cleaner data foundations and make informed decisions about the tools they bring into their stack.

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Articles by Sergey Kisly

The image features a group of people working together to build and assemble a robot. There are four individuals actively engaged in the process, with two men kneeling down next to each other on the left side of the scene, while another man is standing up holding a tool. On the right side, there's one person who appears to be looking at something or observing the progress being made by the others. The robot itself can be seen in the middle of the image, with its arms and legs visible as it takes shape under their collective efforts.

June 30, 2026

15 Min

How to Measure AI Tool ROI in Marketing Ops: Cost Savings, Pipeline Impact, and Adoption Metrics

Learn how to measure AI tool ROI in marketing operations with a practical framework covering cost savings, pipeline impact, and adoption metrics that go beyond usage counts.

AI Strategy

The image features an abstract graphic design with a large number "12" prominently displayed at the center of the frame. The number is composed of various shapes and lines that create a visually striking representation of the number 12. The design also includes a star located towards the right side, adding to its unique and eye-catching appearance.

June 29, 2026

27 Min

Marketing Analytics Governance Checklist for SaaS Revenue Teams

A practical checklist for Marketing Ops and RevOps leaders at mid-market B2B SaaS companies to govern analytics data, define metrics, standardize dashboards, and build a repeatable operating model for clean revenue reporting.

Data Analytics & Governance

The image features an illustration of a robot standing on a track with cars around it. The robot is holding a flag and appears to be participating in a race or competition. There are several cars scattered throughout the scene, some closer to the robot while others are further away. The overall atmosphere suggests that this could be a futuristic or imaginative concept art piece rather than an actual photograph of a robot on a track with cars around it.

June 25, 2026

15 Min

7 Best AI Lead Scoring Tools for SaaS Teams Using Salesforce or HubSpot in 2026

Compare the 7 best AI lead scoring tools for SaaS teams on Salesforce or HubSpot. Includes pricing, pros and cons, data requirements, and best-fit use cases.

AI Strategy

The image features an illustration of two clouds with the word "vs" written on them. The clouds are positioned above each other and appear to be in a competition. One cloud is located at the top left corner of the image, while the other one is situated towards the bottom right side. Both clouds have lightning bolts drawn beneath them, adding an element of excitement to the scene.

June 22, 2026

16 Min

HubSpot or Salesforce for Revenue Reporting: Which CRM Setup Works Best for SaaS Marketing Leaders?

HubSpot and Salesforce handle revenue reporting differently. Compare attribution models, data architecture, and setup to find the right CRM for your SaaS marketing team.

Analytics

"I am an AI and I can see that you have drawn a picture of a dump truck with a robot on it. The robot is standing next to the dump truck which has its door open, revealing piles of trash inside. It seems like the robot might be trying to help or investigate what's in the truck. The image captures a unique moment where technology and nature interact."

June 12, 2026

14 Min

Marketing Data Readiness for AI Agents: What to Fix Before Automating Analytics Workflows

AI agents fail on bad data. Learn how to audit your CRM, GA4 tracking, UTM governance, and consent signals before automating analytics workflows.

Data Analytics & Governance

The image features an illustration of a robot standing on its hind legs and holding a book in its hands. The robot is surrounded by numerous pipes that extend into the background, creating a sense of depth to the scene. The overall composition gives off a playful and whimsical vibe, as if the robot is engaging with the world around it or perhaps even reading from the book it holds.

June 03, 2026

20 Min

9 Best Reverse ETL Tools for CRM & Ad Platform Sync in 2026

Compare the 9 best reverse ETL tools for syncing warehouse data to CRMs and ad platforms. Covers pricing, integrations, warehouse support, and GTM use cases for B2B SaaS teams.

Data Analytics & Governance

The image is an illustration of a building with people inside it and construction equipment around the outside. The drawing depicts a scene where workers are busy constructing the building, while others watch from the outside. There are several individuals in various positions within the building, some closer to the foreground and others further away. A crane can be seen near the top right corner of the image, indicating ongoing construction work.

May 28, 2026

18 Min

CDP, Data Warehouse, or CRM: Which Customer Data Stack Should SaaS Marketers Build First?

Mid-market SaaS teams: CDP, warehouse or CRM first? Here is how to get the build order right before AI workflows raise the cost of getting it wrong.

Data Analytics & Governance

The image features an illustration of a man wearing a suit and tie, who appears to be in distress as he holds his head up high with his hands on his shoulders. The scene is set against a green background adorned with stars, giving it a whimsical feel. The man's position within the shield-like structure suggests that he might be facing some sort of challenge or problem.

May 21, 2026

15 Min

Google Consent Mode V2 Mistakes That Break Analytics, Paid Media Reporting and Retargeting

Five consent mode v2 mistakes that corrupt GA4 data, break attribution and drain retargeting audiences, and how to fix each one.

Analytics

The image features an illustration of a man holding up a computer monitor and keyboard on his shoulder while standing next to a building with a crane. The scene is set against a green background that includes a cityscape and a skyline in the distance. The man appears to be engaged in some sort of work or activity related to technology, possibly involved in construction or maintenance tasks involving computers and other electronic devices.

May 13, 2026

15 Min

Server-Side vs Client-Side Tracking: Which Delivers More Reliable GA4 Data in 2026?

GA4 data gaps distort budget decisions. This guide helps B2B SaaS teams compare server-side and client-side tracking setups and choose the right approach for 2026.

Data Analytics & Governance

The image is a black and white illustration featuring a large funnel with a small cup at its bottom. The funnel appears to be filled with something, possibly water or another liquid. Surrounding the funnel are various objects such as a computer monitor, a camera, and a keyboard. These items seem to be part of an elaborate setup for some sort of experiment or demonstration involving the funnel.The image is an illustration of two cookies with holes on top and bottom sides, surrounded by various other objects such as stars, circles, and squares. The cookie-like shapes are placed throughout the scene, creating a whimsical and playful atmosphere.

May 07, 2026

20 Min

9 Best Marketing Attribution Tools for Mid-Market SaaS Teams in 2026

Nine marketing attribution tools for mid-market SaaS teams: real pricing, capabilities, pros and cons, and selection criteria based on CRM, sales cycle, and budget.

Marketing

The image is an illustration of two cookies with holes on top and bottom sides, surrounded by various other objects such as stars, circles, and squares. The cookie-like shapes are placed throughout the scene, creating a whimsical and playful atmosphere.

May 06, 2026

17 Min

9 Best Consent Management Platforms for SaaS in 2026 (+ How to Choose)

Compare nine consent management platforms for SaaS in 2026. Includes GA4 and GTM integration, attribution impact, pricing, and a decision guide by stack type.

Security

The image features two distinct scenes set against each other on a white background. In the first scene, there are people working together to create a diagram using various charts and graphs. The second scene depicts an individual robot assembling a chart by itself. These images showcase different aspects of collaboration between humans and technology in creating visual representations or data analysis tools.

April 29, 2026

10 Min

AI-Powered Marketing Reporting vs. Manual Dashboards: A Side-by-Side Breakdown for B2B SaaS

Compare AI-powered marketing reporting and manual dashboards for B2B SaaS teams. See where each approach breaks down and which fits your reporting stage.

Analytics

The image features an illustration of a wrench with the letter "G" on it, surrounded by various other objects and symbols. The wrench is positioned at the center of the image, drawing attention to itself as the main focus. Surrounding the wrench are different shapes and icons that represent different aspects or functions related to the wrench's purpose. These elements create a visually engaging composition that highlights the importance of the wrench in the context of its use or repair.

April 27, 2026

11 Min

Google Consent Mode v2 Implementation Checklist for SaaS Marketing Teams

Step-by-step Google Consent Mode v2 checklist for SaaS teams: GTM setup, consent signals, validation, and June 2026 compliance updates.

Analytics