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Millie vs Zei Comparison (2026)

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Millie logo

Millie

Zei logo

Zei

Overview

Millie is a cloud-based donation and volunteering platform offering features such as online giving, volunteer events management, donation matching and more.

Zei is a sustainability management platform that helps organizations measure and reduce their carbon footprint, centralize ESG data, engage suppliers, and streamline sustainability reporting from a single platform.

  • Platforms supported
  • Web-based
  • iPhone app
  • Android app
  • Windows Phone app
  • Typical customers
  • Freelancers
  • Small businesses
  • Mid size businesses
  • Large enterprises
  • Customer support
  • Phone
  • Online
  • Knowledge base
  • Video tutorials
  • Platforms supported
  • Web-based
  • iPhone app
  • Android app
  • Windows Phone app
  • Typical customers
  • Freelancers
  • Small businesses
  • Mid size businesses
  • Large enterprises
  • Customer support
  • Phone
  • Online
  • Knowledge base
  • Video tutorials

Video & Screenshots

Pricing

Starting from

Empty state illustration for "No pricing info"

No pricing info

  • Free trial available
  • Credit cardless trial
  • Free account
  • Subscription based

Starting from

1

Per year

  • Free trial available
  • Credit cardless trial
  • Free account
  • Subscription based

User reviews

4.9

41

5

4

3

2

1

37

4

0

0

0

  • Value for money
  • Ease of use
  • Features
  • Customer support
93%
would recommend this app

4.7

45

5

4

3

2

1

32

12

1

0

0

  • Value for money
  • Ease of use
  • Features
  • Customer support
91%
would recommend this app

Pros

“Being able to track my remaining annual matching budget right on my dashboard and see my employer double my contribution in real time, without having to upload receipts or fill out HR forms, saves me time and ensures I never leave matching dollars on the table.”
Verified reviewer profile picture

Seth S.

Director, Analysis and Insights

“The process for managing and canceling monthly donations was not immediately intuitive and required additional navigation to locate within the UI.”
Verified reviewer profile picture

Alicia D.

Senior Software Engineer

“I love that Millie is such an accessible and intuitive platform built for people who are already busy helping change the world and making it easier for them to make an impact!”
Verified reviewer profile picture

Amanda J.

Account Manager

Pros

“Very intuitive interface that centralizes all our ESG and sustainability data in one place, instead of juggling multiple spreadsheets and tools.”
Verified reviewer profile picture

Emmanuel N.

CEO

“There are some connectivity bugs, and since ZEI is still new, it requires some feedback to become easier to use and user friendly.”
AK

Axelle K.

RSE QSE

Cons

“The fact that you have to first add money into your wallet and then donate is very clunky.”
KN

Kishore N.

Electrical Enginer

Cons

Not enoughreviews yet

  • Vendor responds to reviews
  • Last review2 months ago
  • Vendor responds to reviews
  • Last review13 days ago

Key features

  • Total features29
  • AI Copilot
  • AI/Machine Learning
  • Access Controls/Permissions
  • Activity Dashboard
  • Activity Tracking
  • Ad hoc Reporting
  • Air Emissions Management
  • Alerts/Notifications
  • Archiving & Retention
  • Assessment Management
  • Attendance Management
  • Audit Management
  • Audit Trail
  • Auditing
  • Benchmarking
  • Calendar Management
  • Carbon Emissions Calculations
  • Change Management
  • Compliance Management
  • Compliance Tracking
  • Contribution Tracking
  • Corrective and Preventive Actions (CAPA)
  • Customizable Branding
  • Customizable Dashboard
  • Customizable Reports
  • Customizable Templates
  • Data Collection
  • Data Import/Export
  • Data Management
  • Data Visualization
  • Disclosure Management
  • Document Management
  • Donation Disbursement Management
  • Donation Management
  • Donation Matching
  • Email Alerts
  • Emission Calculations
  • Emission Reduction Planning
  • Emissions Management
  • Emissions Monitoring
  • Employee Engagement
  • Energy Management
  • Environmental Compliance
  • Environmental Metrics
  • Event Management
  • Forecasting
  • Forms Management
  • Framework Management
  • Fundraising Campaign Management
  • Fundraising Campaign Tracking
  • Generative AI
  • Goal Setting/Tracking
  • Grant Management
  • Greenhouse Gas Tracking
  • Group Management
  • Hazardous Materials Management
  • Impact Management
  • Incident Management
  • Mobile Access
  • Multi-Channel Data Collection
  • Multi-Location
  • Online Giving
  • Online Payments
  • Performance Metrics
  • Policy Management
  • Reminders
  • Reporting & Statistics
  • Reporting/Analytics
  • Reporting/Project Tracking
  • Scoring
  • Secure Data Storage
  • Stakeholder Engagement
  • Sustainability Management
  • Task Management
  • Third-Party Integrations
  • Time Tracking
  • Training Management
  • User Management
  • Volunteer Recruiting
  • Waste Management
  • Water Management
  • Workflow Management
  • Total features58
  • AI Copilot
  • AI/Machine Learning
  • Access Controls/Permissions
  • Activity Dashboard
  • Activity Tracking
  • Ad hoc Reporting
  • Air Emissions Management
  • Alerts/Notifications
  • Archiving & Retention
  • Assessment Management
  • Attendance Management
  • Audit Management
  • Audit Trail
  • Auditing
  • Benchmarking
  • Calendar Management
  • Carbon Emissions Calculations
  • Change Management
  • Compliance Management
  • Compliance Tracking
  • Contribution Tracking
  • Corrective and Preventive Actions (CAPA)
  • Customizable Branding
  • Customizable Dashboard
  • Customizable Reports
  • Customizable Templates
  • Data Collection
  • Data Import/Export
  • Data Management
  • Data Visualization
  • Disclosure Management
  • Document Management
  • Donation Disbursement Management
  • Donation Management
  • Donation Matching
  • Email Alerts
  • Emission Calculations
  • Emission Reduction Planning
  • Emissions Management
  • Emissions Monitoring
  • Employee Engagement
  • Energy Management
  • Environmental Compliance
  • Environmental Metrics
  • Event Management
  • Forecasting
  • Forms Management
  • Framework Management
  • Fundraising Campaign Management
  • Fundraising Campaign Tracking
  • Generative AI
  • Goal Setting/Tracking
  • Grant Management
  • Greenhouse Gas Tracking
  • Group Management
  • Hazardous Materials Management
  • Impact Management
  • Incident Management
  • Mobile Access
  • Multi-Channel Data Collection
  • Multi-Location
  • Online Giving
  • Online Payments
  • Performance Metrics
  • Policy Management
  • Reminders
  • Reporting & Statistics
  • Reporting/Analytics
  • Reporting/Project Tracking
  • Scoring
  • Secure Data Storage
  • Stakeholder Engagement
  • Sustainability Management
  • Task Management
  • Third-Party Integrations
  • Time Tracking
  • Training Management
  • User Management
  • Volunteer Recruiting
  • Waste Management
  • Water Management
  • Workflow Management

Integrations

  • Total integrations5
  • Auth0
  • Google Calendar Extension
  • Jira
  • Lucca
  • Microsoft Entra ID
  • Okta
  • Slack
  • Total integrations2
  • Auth0
  • Google Calendar Extension
  • Jira
  • Lucca
  • Microsoft Entra ID
  • Okta
  • Slack

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