If your local is evaluating union management software, you have probably come across both eMembership and Union Impact. Both platforms are purpose-built for labor unions, both are cloud-based, and both cover the core needs that locals depend on: membership records, dues processing, grievances, communications, and reporting.

That overlap can make the decision harder, not easier. This comparison is designed to help union leaders understand where the two platforms genuinely differ so you can match the right tool to the way your local actually operates. We are an eMembership publication, so we are transparent about our perspective, but we have written this to be useful regardless of which platform you choose.

Why we wrote this comparison

We wrote this piece because union technology decisions are consequential; a platform that fits one local’s structure and budget may be the wrong choice for another. The goal here is to give you enough specifics to have a productive conversation with both vendors during the demo process.

What both platforms have in common

Before diving into differences, it is worth acknowledging what eMembership and Union Impact share. Both platforms were designed specifically for labor unions rather than adapted from association management or generic CRM software. That distinction matters because union-specific needs, like classification-based dues, CBA management, grievance tracking, and dispatch, require a fundamentally different data model than what association tools provide.

eMembership and Union Impact both offer cloud-based access, so staff and stewards have the ability to work from the office or in the field. Neither platform is a startup experiment. Union leaders evaluating either option are looking at established software with active client bases. Both platforms have been on the market for well over a decade, serving real unions and supporting membership records, dues processing, grievance management, employer tracking, communications, and reporting over many contract cycles.

Where eMembership and Union Impact differ

eMembership and Union Impact diverge in a few concrete ways. eMembership offers a native iOS and Android member app, while Union Impact relies on a browser-based member portal. The eMembership platform also runs in Winmill’s own data center, independently certified across HIPAA, ISO 27001, and PCI DSS standards rather than third-party cloud infrastructure. And when a local moves off a legacy system, eMembership migrates its data in a parallel preview environment that your staff validates before any cutover, so your existing system stays live until your team signs off. The sections below cover these differences, along with pricing, modules, updates, and support.

Pricing and seat structure

eMembership is priced as a subscription based on the modules your union uses, not on the number of members or staff users. There are no per-seat or per-member fees, so adding stewards, officers, or members never increases what you pay. Because pricing follows the modules you actually need rather than your headcount, your costs stay predictable as your local grows or organizes. The platform is configured to your union’s specific structure during the Discovery Process, where Winmill documents which of eMembership’s 18 modules your local needs and produces a clear price for that scope.

Union Impact also uses a modular subscription scoped to a local’s needs. Public pricing detail is limited, as it is for most vendors in this category, so the practical step with either platform is the same: ask for a written quote based on the modules you actually need, and compare the full cost of ownership over the first few years, including any customization and implementation charges.

Module depth and configurability

eMembership is built around a modular platform scoped through a Discovery Process: the deployment team works with each union to determine which modules are needed before configuration begins. The platform covers Member Management, Employer Management, Contract Management, Member Payments and Billing, Employer Payments and Billing, Grievances, Organizing, Dispatch, Meetings and Events, Communications, Surveys and Votes, Call Center, Electronic Signatures, Reports and Queries, Dashboards, and Data Import, with the Member Web Portal and Member Mobile App available as additions. Every module shares a single database, which means a dues record is connected to the member, their employer, their contract, and their classification without manual linking or data re-entry. Winmill also builds and hosts membership portal sites and dedicated union websites alongside the platform.

Union Impact covers a comparable range of core capabilities including membership, dues, dispatch, grievances, project tracking, and communications, and offers website design and hosting as an additional service.

Implementation approach

eMembership implementations begin with a structured Discovery Project, a fixed-scope, fixed-price engagement that runs approximately four weeks and includes four to six interactive sessions with your team. The deployment team works area by area through your current processes, documenting dues rules, member statuses, day-to-day processes, security requirements, reporting needs, and every configuration your local requires. Nothing is assumed. The deliverable is a formal Discovery Package with three components: a confirmed implementation scope covering every screen, report, and process the system must support; a fixed cost with no estimates or ranges, a number you can take to your board; and a milestone schedule with clear go-live dates. Data migration occurs in a parallel preview environment where your staff validates the platform’s functionality before the cutover. The existing system stays live until your team has signed off. Cutover is managed with on-site or remote support depending on your union’s preference.

Union Impact also provides onboarding and migration support, though their specific implementation methodology is less publicly documented. Unions evaluating Union Impact should ask to speak with references who have completed a migration from a legacy system to understand the timeline, data validation process, and post-launch support.

Ongoing development and enhancements

eMembership includes two platform releases per year as part of the subscription, with every enhancement delivered automatically to all clients at no additional charge. Each release is first deployed to the client’s own test environment, where the union has up to 30 days to review and approve it before it reaches production, so changes never land without the client’s sign-off. The enhancements roadmap is transparent, with shipped and planned work posted on the platform updates page, and the team regularly surveys clients about the needs they want addressed next. Union Impact also includes platform updates in its subscription and keeps its software current with modern browsers and devices.

Support and training

With eMembership, onboarding and hands-on training happen through the Discovery and implementation sessions, with optional on-site training available. After go-live, the US-based support team, which works exclusively on union technology, gives clients direct access to the people who built their configuration rather than a general help desk. Every client is assigned a dedicated Project Manager and Account Manager who can be reached by phone or email, alongside a structured helpdesk for logging and escalating requests. Application hosting is supported 24/7 so the platform stays available, and Winmill commits to fast, defined response targets for critical issues, backed by service-level credits if those targets are not met. Union Impact provides phone and email support, live onboarding sessions, training documentation, and optional on-site training. As with any vendor, the most reliable way to evaluate support quality is to speak with current clients directly.

Security and hosting

eMembership is hosted in Winmill’s own data center, where Winmill owns and operates the physical infrastructure rather than renting from a third-party cloud provider. The facility is certified under SOC 1 (SSAE18/ISAE3402), SOC 2, HIPAA, ISO 27001, and PCI DSS, with 24/7 on-site staffing, clustered firewalls, TLS encryption in transit, disk-level encryption at rest for sensitive fields, and nightly encrypted offsite backups. Server hardware is refreshed every three to four years at no charge to the union. Union Impact’s platform is hosted in SOC 2 Type II and SOC 3 Type II data centers, with HTTPS/SSL encryption in transit and nightly off-site backups.

Side-by-side comparison table

The table below summarizes key differences across the dimensions that union leaders most frequently ask about during evaluations.

When Union Impact may be a better fit

Union Impact is an established platform with an active client base, and no comparison can decide for you which tool fits your local best. A union already running on Union Impact that finds it meets its needs may have little reason to take on the cost and effort of switching. For everyone else, the most reliable approach is to put both platforms in front of your team and judge them against your union’s actual requirements rather than any single article.

When eMembership is the stronger choice

eMembership is built for unions that manage real operational complexity, and it is not a one-size-fits-all product. Every implementation is configured to the specific requirements of your union, so if you handle classification-based dues across multiple contracts, multi-employer remittance, dispatch, grievance tracking with configurable processes, organizing with field rep tracking, and DOL-compliant reporting, the platform is shaped around how your local actually works.

It is also a strong choice for unions moving off a legacy system with large, complex data sets. Data migration is not an afterthought here; it starts on day one of the engagement and runs in a parallel environment your staff validates before any cutover, so nothing goes live until your team has signed off.

Pricing follows the modules you use rather than your headcount, so you will not get hit with new costs when you hire staff or your membership grows. Whether your local is midsize or among the largest in your international, you pay for the capabilities you need, and adding members never raises your software bill.

“eMembership has enabled us to run our operations and to engage with our members in ways we never thought possible. It supports our membership team, finance team, organizers, field reps and executives, saving us valuable time and increasing collaboration across our staff.” Jessica S., Director of Membership and Communications, PSE SEIU Local 1948 (eMembership client)

“One thing that truly sets them apart is their exceptional support team: knowledgeable, proactive, and always ready to go the extra mile.” Calvin G., Recording Secretary and Privacy Officer, CUPE Local 4070 (eMembership client)

“There has never been a time when I wasn’t able to get in touch with someone. Everything has been so easy.” Marlaina F., ILWU Local 13 (eMembership client)

These client results reflect the kind of operational transformation that becomes possible when a local moves from disconnected legacy tools to a unified, configurable platform. Read the full success stories on our website.

How to decide

The best way to evaluate any platform is to bring your union’s actual needs to the conversation. Before you schedule a demo with eMembership, Union Impact, or any other vendor, document how your local handles membership, dues, grievances, organizing, communications, and reporting. Then ask each vendor to show you how their platform handles those specific needs.

A few questions worth asking vendors during your evaluation:

The goal is to find a vendor that can answer these questions clearly and succinctly, with specific examples and facts readily available, so they can demonstrate real experience. You need to find the right fit for your local.

A good place to start is also using a third party evaluation tool, like Source Forge, to compare different software capabilites side-by-side.