Hammock vs Legacy TPAs: WEX, Navia, and Igoe Compared

Short answer: Hammock is best for teams ready to improve employee experience, speed up support, and turn underused accounts into benefits employees can use for healthcare and eligible wellness spending. Legacy TPAs such as WEX, Navia, and Igoe suit employers and brokers that prefer a familiar administrator with established processes across FSA, HRA, HSA, COBRA, and related benefits.

WEX, Navia, and Igoe have different products, service teams, and contracts. The useful comparison is between two operating models: scaled, portal-led administration and a modern platform built around utilization.

What Is a Legacy TPA?

A third-party administrator, or TPA, runs benefits programs on an employer's behalf. Depending on the provider and contract, that work may include plan setup, enrollment, payroll files, debit cards, claims adjudication, reimbursements, notices, reporting, and compliance support.

WEX, Navia, and Igoe represent a familiar category of broker-distributed administrators. These firms can manage combinations of FSAs, HRAs, HSAs, COBRA, commuter benefits, and other accounts at scale. Many have long relationships with brokers, carriers, payroll systems, and employers.

Their strengths come from breadth and repetition. The member layer can be weaker. Employees often meet the benefit through a portal, claim form, or support queue. Pricing commonly follows a per-employee-per-month model and varies by enrollment, products, and contract.

Good fit: Employers that value broad product coverage, established workflows, and a familiar broker-distributed vendor.

What Is Hammock?

Hammock is an AI-powered benefits platform that administers HSAs, FSAs, HRAs, LSAs, Dependent Care FSAs, COBRA, and commuter benefits on one platform. It pairs core administration with a modern HSA debit card, unlimited Letters of Medical Necessity (LMNs), and hands-on support. A qualifying LMN can support pre-tax spending on categories such as gym memberships, supplements, massage, sauna, and sleep technology.

For employers, Hammock also offers a capped GLP-1 Specialty HRA designed to preserve HSA eligibility for qualifying HDHP populations. A dedicated account manager and shared Slack channel give HR and broker teams a direct path to someone who knows the plan. Launch can happen in as little as one week.

Hammock can replace an incumbent administrator. It can also start as a no-migration wellness layer, which lets the employer keep its current TPA while improving the employee spending experience.

Best for: Employers and brokers that want higher utilization, a modern member experience, and close implementation support.

Hammock vs Legacy TPAs: Feature Comparison

Feature	Hammock	Legacy TPAs such as WEX, Navia, and Igoe
HSA and FSA administration	Yes	Commonly available; exact suite varies
Other benefit accounts	HSA, FSA, HRA, LSA, DCFSA, COBRA, and commuter on one platform	HRA, COBRA, commuter, and other accounts often available; exact suite varies
Employee experience	Modern, utilization-focused card and account experience	Typically portal and claims-workflow focused
Unlimited LMNs included	Yes	Generally not a built-in wellness pathway
Wellness spending layer	Core product capability	Varies; often handled through standard claims or separate programs
Client support	Dedicated account manager and shared Slack channel	Varies by provider, contract, and team
Implementation	Full replacement or no-migration layer; launch possible in one week	Traditional implementation timeline varies
Pricing	See website for current pricing	Custom pricing, often based on enrollment and product mix

Legacy TPA Pros and Cons

Pros

• Broad administration. One TPA may cover several account types plus COBRA and commuter programs.
• Broker familiarity. Advisors often know the vendor's implementation process, file formats, and renewal cycle.
• Established compliance operations. Mature administrators have documented procedures for high-volume plan activity.
• Scale. Large TPAs can support complex eligibility files and national workforces.

Cons

• Employee workflows can feel dated. Portal navigation, uploads, and form-heavy claims may create friction.
• Claims may involve manual handoffs. Speed and service vary, but older operating models can turn a simple reimbursement into a small scavenger hunt.
• Utilization may not drive the roadmap. Processing elections and claims is different from helping employees discover useful eligible expenses.
• Support quality can depend on the contract. A broker or employer may have an account team while employees enter a general queue.
• Wellness often sits elsewhere. A separate stipend or LSA can add another vendor, another login, and taxable dollars.

Hammock Pros and Cons

Pros

• Designed for utilization. The product helps employees connect tax-advantaged accounts to health spending they already understand.
• Unlimited LMNs are included. Clinically appropriate wellness expenses can move through a defined documentation path.
• White-glove support. HR and brokers get a dedicated account manager plus a shared Slack channel.
• Fast launch. Hammock can go live in as little as one week when scope and data are ready.
• Flexible replacement wedge. Employers can add the wellness layer before moving core administration.

Cons

• Narrower suite. Employers seeking every benefit type from one large TPA should compare the full product checklist carefully.
• Newer operating history. Hammock does not have the decades-long administration record of the largest incumbents.
• A switch still needs disciplined ownership. Payroll, plan timing, member data, and communication will not move themselves.
• LMNs do not guarantee eligibility. Each expense must meet applicable rules and clinical criteria.

Why Employers Replace a TPA

Employers switch after repeated friction: employees cannot find balances, claims take too long, HR spends hours escalating tickets, or the benefit stays underused through another renewal.

That underuse has a cost. Employees miss tax savings and may view the HSA or FSA as paperwork instead of compensation. Employers also miss possible payroll-tax savings when workers contribute less through the cafeteria plan. Our guide to why employees don't use HSA benefits covers the common barriers.

Wellness can make the account easier to grasp. Employees already know what they pay for fitness, recovery, supplements, and sleep. When medically necessary expenses qualify and the documentation is handled correctly, the benefit becomes visible. Tax and plan results depend on the facts; this is not tax or legal advice.

How Hammock Helps With an Administrator Switch

Hammock supports two paths.

With a full replacement, Hammock takes over HSA and FSA administration. Implementation covers eligibility, payroll, plan timing, communication, cards, and required transfers. Our administrator switching guide lays out the project.

A mid-year switch may be possible when the employer has a clear reason to move before renewal. FSAs and HSAs behave differently, so claims runout, balances, payroll deductions, and participant notices need separate treatment. Read the mid-year HSA administrator switch guide before choosing a date.

With the no-migration path, the legacy TPA remains in place and Hammock adds the LMN-based wellness layer. This approach gives brokers a lower-friction entry point and gives employers real utilization data before a broader replacement decision.

What Brokers Should Evaluate

A broker should score more than quoted per-employee pricing. Ask how quickly employees receive help, who owns failed files, how claims exceptions move, whether HR has a named escalation point, and what the vendor does to improve participation after open enrollment.

Product breadth still matters. A client that needs HSA, FSA, HRA, COBRA, commuter, and several specialty accounts may accept a more traditional experience in exchange for consolidation. Another client may care most about employee adoption and service. The broker guide to modern HSA administrators offers a fuller evaluation framework.

Plan communication belongs on the scorecard too. Employees use benefits they can explain. Our benefits employees use guide shows how useful design beats another dense PDF in the enrollment folder.

FAQ

What does a benefits TPA do?

A TPA administers programs such as FSAs, HRAs, HSAs, COBRA, or commuter benefits for an employer. Scope varies by vendor and contract, so buyers should confirm custody, claims, notices, plan documents, integrations, and support responsibilities.

Are WEX, Navia, and Igoe the same?

No. They are separate administrators with different products, technology, service models, and market footprints. This comparison uses them as examples of the established TPA category, not as interchangeable companies.

Can an employer switch HSA or FSA administrators mid-year?

Often, yes, though the work differs by account type. HSA assets belong to employees, while FSA balances and claims follow the employer's plan rules. Counsel and benefits advisors should review the transition design.

Does Hammock require an employer to replace its TPA?

No. Hammock can add its wellness and LMN layer without migrating the current administrator. A full HSA and FSA replacement is also available.

How should a broker compare TPA pricing?

Compare the full contract, including implementation, account fees, payment-card terms, claims service, COBRA charges, minimums, integrations, and renewal increases. Custom TPA pricing varies by employer size and product mix.

The Bottom Line

Legacy TPAs remain a reasonable fit for employers that want broad administration, mature processes, and a vendor their broker already knows. WEX, Navia, and Igoe each deserve evaluation on their own terms.

Hammock fits employers ready to improve the part employees feel. Modern HSA and FSA administration, unlimited LMNs, eligible wellness spending, direct support, and a no-migration starting point give HR and brokers a practical path away from low utilization.

Ready to compare your current administrator with Hammock? Talk to our team.