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Nixflex automatically deletes call data 90 days after the call ends. Account data (your agents, phone numbers, API keys) stays until you delete it.

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What gets deleted after 90 days

A scheduled job runs every day at 3 AM UTC and deletes records older than 90 days:

Calls

Call records, transcripts, summaries, sentiment, extracted data, duration - and the audio recording itself.

SMS messages

Inbound and outbound SMS sent through your agents.

Webhook deliveries

Logs of every webhook payload Nixflex sent to your endpoints.

Outbound campaigns

Campaigns and their recipient lists.

SMS campaigns

SMS broadcast campaigns and recipient lists.

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What stays until you delete it

Your account

Login email, name, account creation date.

Agents

Prompts, voice configuration, all agent settings.

Phone numbers

Numbers you have imported, with their carrier credentials.

API keys

Keys you have created for programmatic access.

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Audio recordings

Nixflex holds the recording. When a call ends, Nixflex downloads the audio from your carrier, stores it in EU (Ireland) storage, and then deletes the carrier’s copy. The file is removed with the rest of the call record after 90 days.
This is what both carriers recommend. Twilio charges for recording storage and documents downloading recordings to avoid those charges. Telnyx keeps recordings for up to a year and advises fetching what you need in good time. Holding the file in the EU also keeps recordings inside the EU for GDPR purposes, rather than wherever your carrier account happens to be.
Need recordings for longer than 90 days? Download the file from recording_url when the call.completed webhook fires and keep it in your own storage. That also gives you your own retention policy.
You can switch recording off entirely, per agent or per number - see Call recording. With it off, no audio is captured anywhere, and the transcript is still produced.

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Where the data is stored

All Nixflex data lives in EU/UK Supabase (Ireland region):
  • GDPR compliant by default - data does not leave the EU
  • UK data residency for UK businesses
  • Encrypted at rest (AES-256) and in transit (TLS 1.3)

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Manual deletion before 90 days

Delete a phone number

Removes the number from your account.

Delete an agent

Removes the agent and all its configuration.

Delete an SMS campaign

Removes the campaign and its recipient list.

Delete a call

Erases one call record, transcript, and recording file.

Delete all call data

Erases every call, recording, and SMS message on your key.
Call deletion is immediate and irreversible: DELETE /v1/calls/:id removes the record, the transcript, and the recording file in one request, and DELETE /v1/calls clears everything on your key. There is no recovery window and backups do not restore deleted recordings, so fetch anything you need to keep first. The 90-day cleanup remains the automatic backstop for everything you do not delete yourself.

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GDPR data subject requests

If one of your end-users asks for their data to be deleted under Article 17:
  1. Find their calls and SMS messages by phone number through the API
  2. Erase each one with DELETE /v1/calls/:id - the record, transcript, and recording go together. With the SDK: await client.calls.delete(callId)
  3. Delete any copies you downloaded and stored in your own system
  4. The 90-day cleanup acts as a backstop - anything missed is deleted automatically
You can complete an Article 17 request yourself, in your own code, without contacting us.
Because Nixflex deletes the carrier’s copy of each recording after downloading it, there is normally nothing left to erase on your Twilio or Telnyx account. Check there anyway if you have your own recording configured directly on the carrier, outside Nixflex.
For account-level deletion, use Settings → Delete account in the dashboard. Your calls, recordings, and messages are purged first, then your login is removed. Billing records are retained as required by tax law.

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Roadmap

Coming soon

  • Configurable retention windows (30 / 60 / 90 days per agent)
  • Per-agent PII redaction in transcripts