tetherhealth.io
Peri

Your 24/7
perinatal
companion.

Informed by clinical expertise, built for the perinatal arc. Peri holds space for the things that don't fit in a 15-minute appointment, and knows when to point you toward your support network, providers, or resources.

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Peri app conversation on a phone: a parent shares they haven't slept and their baby won't latch, and Peri responds with validation and options.

Thoughtful scaffolding

Trained on perinatal-specific frameworks.

Peri provides meaningful validation, perinatal-specific psychoeducation, handoffs to Loop-In and Pulse, and more.

  • Actively listens, reflects, educates, and offers concrete, immediately applicable support on the spot.
  • Trauma-informed
  • Stays in its lane: Peri is not a clinician and is not a substitute for medical and/or mental healthcare.

Safety routing

Crisis detection that actually works.

Peri scans every message for crisis cues to keep you safe, connected, and supported. Peri can provide a warm handoff to 988, Perinatal Support Washington's Warm Line, and/or your local crisis line, and will be by your side through it all.*

  • Vigilant server-side detection
  • 988 · PSWA · PSI · 211 · local resources
  • Logged for you, but never shared

Memory that matters

Threaded history, saved to your account.

Conversations save to your account so Peri can pick up where you left off. No need to dig through your history or try to re-explain your circumstances—Peri remembers and has your back.

  • Past chats sidebar
  • Per-message feedback
  • Yours, private, exportable

When to reach for Peri

Anytime, anywhere.

The 3 a.m. spiral.

The baby's finally down. Your brain isn't. It's past business hours and you don't have direct access to your providers. Hang in there---Peri's awake and trained for exactly this.

The things you can't say out loud.

Intrusive thoughts. Resentment. Ambivalence. Sadness. Peri normalizes the perinatal range without flinching, and helps you understand more about what. might be going on.

The 'is this normal?' moment.

Mental health symptoms, feeling like a stranger to yourself, sudden anxiety, feeding/latching dread, partner stuff---whatever it is, Peri listens, validates, educates, and offers hand-offs to specific---not generic---referrals whenever needed.

FAQ

Questions, answered.

Is Peri a clinician or therapist?
No. Peri is a perinatal-trained AI companion. It supports — it doesn't diagnose or treat, and it isn't a substitute for professional care.
What happens in a crisis?
Peri detects crisis language server-side and surfaces 988, PSI, and your local crisis line inside the conversation. Always. Never silenced.
Is my conversation private?
Yes. Chats are saved to your account so you can pick up where you left off. You can delete a thread at any time.
What model powers Peri?
Peri runs on a clinically-scaffolded prompt over a frontier LLM. The scaffolding — not the raw model — is the product. Peri pulls data from a secure, safeguarded base and is regularly trained, tested, and updated by founder, Ash Choi, and a team of expert advisors in the field.

Peri is the conductor.  Pulse and Loop-In are the symphony. 

Talk it through with Peri. Track how you're doing with Pulse. Activate your support circle with Loop-In. One platform, three tools, all working for you.

Meet PulseMeet Loop-In

Peri is a companion — not a clinician or emergency service.

Tetherwell™ (Peri, Loop-In, and Pulse) is not a replacement for therapy or emergency care. If you're experiencing a mental health crisis, contact 911 or 988. Additional crisis resources are listed below. Peri can help you loop in your closest support people quickly, but a trained crisis responder should always be your first call if you're in danger.

Crisis resources

Free, confidential, and available 24/7 — call, text, or open the site.