Oasys vs TheraNest: Which Is Better for a Group Practice?

Short answer: for a group practice with five or more clinicians, especially one running supervisees or a training program, Oasys is the better fit, because supervision, permissions, and payroll are native rather than left for the practice to rebuild. For a small practice with a fluctuating caseload that wants the lowest possible bill in a slow month, TheraNest's active-client pricing is a real advantage and we would say so directly.

This comparison draws on Oasys's ongoing conversations with practice owners, several of them current or former TheraNest customers, plus what both vendors publish about their own pricing and features.

At a glance

On pricing. TheraNest starts around $29 per therapist per month, tiered by active clients rather than seats, so the bill moves with caseload instead of staying fixed. Oasys is $80 per clinician per month on an annual contract, with no add-on tiers. Verified 30 July 2026; confirm current pricing before you sign anything.

Where TheraNest is genuinely strong

This is not a one-sided comparison, and the practices Oasys talks to do not treat it as one either.

TheraNest's active-client pricing is a real advantage for a practice with a caseload that swings seasonally, or one carrying several part-time clinicians with light rosters. Its group and family session handling is reasonable, and practices doing meaningful group work sometimes prefer it for exactly that reason. Billing workflows are straightforward for a practice that does not need heavy customization.

The pattern is not that TheraNest is a weak product. It is that per-active-client pricing and simple billing workflows stop being the thing a practice needs once headcount and claim volume both get real.

Supervision: the clearest difference

TheraNest does not model supervision by credential status. A provisionally licensed clinician who is independently credentialed with payers and does not legally require a co-signature gets the same forced sign-off as a first-year intern, because the platform has one supervision setting, not a relationship-aware one.

Oasys approaches this differently. Supervision is configured per role and per supervisor-supervisee relationship, so a clinician who does not require a co-signature can be exempted without switching supervision off for everyone else.

For a practice running fifteen supervisees, that is the difference between a supervisor spending their week reviewing clinical work and spending it clicking through sign-offs the payer never required.

Payroll: the cost neither platform puts on its pricing page

Neither TheraNest nor SimplePractice models payroll, and TheraNest is no exception. Compensation gets rebuilt in a spreadsheet every pay period once a practice has splits, salaried minimums plus commission, or contractor arrangements to express. One group practice put roughly 20 hours a week of a billing manager's time into exactly that conversion, a number that shows up nowhere on either platform's pricing page.

Oasys models the revenue split natively, supports per-therapist overrides, and produces the payroll ledger as an output rather than a monthly manual project. Payout can be gated on the underlying notes being signed and approved.

Pricing at group-practice scale

TheraNest's active-client pricing is genuinely attractive at low or fluctuating volume, but it inverts at scale: a busy group practice with a full, steady caseload across many clinicians can end up paying more under active-client pricing than it would under a flat per-clinician rate, and the bill is harder to forecast either way.

Oasys is a flat $80 per clinician per month on an annual contract. Billing, supervision, scheduling, documentation, and payroll reporting are included rather than tiered, so a growing practice is not solving a new pricing puzzle every time it adds a clinician.

Billing and claims

TheraNest's billing works, and practices that do not need heavy customization describe it as straightforward. It stays the simpler of the two once claim volume gets real, without the deeper payer-connection tooling that insurance-heavy practices eventually want.

Oasys treats billing as core infrastructure rather than a bolt-on: claims, denials, and reconciliation sit in the same system as the clinical record and the payroll ledger, not a separate tool a biller has to reconcile by hand.

The migration warning

This is the part most comparisons skip, so it is worth being specific.

A practice that moved to TheraNest from another platform described the experience directly:

"That was a nightmare. It was very complex. And we couldn't get the support that we needed despite paying extra for the white glove onboarding service. Things were migrated over and done incorrectly. People gave us contradictory answers and incomplete answers. And so we were really just chasing our tails for a couple of months."

That is one practice, not a pattern, and it is worth reporting because the detail is specific: paid premium onboarding, and still months of cleanup afterward. Anyone considering TheraNest should ask for migration references directly and get the answer in writing.

Group practices typically carry eight to eleven years of records by the time they migrate, and the sentence Oasys hears in a dozen forms is we can't do it twice. Migration is the question Oasys is asked about most. Rather than make promises in a blog post, ask directly what moving a specific system would involve, what comes across, and what happens to appointments already booked.

Who should choose which

Choose TheraNest if a caseload fluctuates seasonally, average cost matters more than predictable cost, and thorough migration diligence is something the practice is willing to do upfront.

Choose Oasys if there are five or more clinicians, supervisees or provisionally licensed clinicians in the mix, payroll being rebuilt in a spreadsheet every month, or a need for role-based permissions and per-clinician pricing without add-on tiers.