Last updated: 30 October 2026. This agreement is between you (or the organisation you represent) and Packet Haven, referred to here as “we” and “us”. Installing or using Packet Echo, or using Packet Lens Web or Packet Blueprint, means you accept it. If you do not accept it, do not install it.
1. What you are buying
Packet Echo Pro is a perpetual licence. One purchase, no expiry, no renewal, and every future version at no further cost. We may change what future versions contain, but we will not switch off a version you already have.
A licence covers one person and up to five of their machines. Each of those five is a seat, and one seat covers one machine at a time — a desktop, a laptop, a virtual machine, a bench build, and one spare for the reinstall. You may move a seat between machines as often as you like by freeing it in your account and activating elsewhere; a seat is not tied to a particular computer for life.
Licences are counted per person, not per company. A team of eight needs eight licences, and an owner or administrator assigns each one to a named person from the account area. This is also what protects them from each other: because a person can only spend seats on their own licence, one colleague reinstalling repeatedly cannot use up seats that belong to somebody else.
Packet Lens Web is a subscription, billed monthly, and it is included at no extra cost with a Packet Echo Pro licence. The subscription exists for people who want the browser edition without buying the Windows application.
Packet Blueprint is free to use. The application runs in your browser and keeps your diagrams there; nothing is uploaded to us, and keeping a backup file is your responsibility. The Packet Lens + Blueprint membership is a monthly subscription, per person, that adds Blueprint's exports and documents (reports, drawings, schedules, labels and the client viewer) and includes Packet Lens Web. Both subscriptions are counted per person, like licences.
2. What you may do
- Install and use the software on up to the number of seats your licence carries, which is five unless your licence says otherwise.
- Use it commercially, including on your clients' networks, as part of paid work.
- Give reports, exports and diagrams it produces to anyone, including clients. Output you generate is yours.
- Move seats between machines freely.
3. What you may not do
- Share, resell, sublicense or publish your licence key. A key is the credential for your seats; treat it as you would a password.
- Use one licence across more machines than it has seats, whether by sharing a key or by any means intended to avoid the seat count.
- Share one licence between several people. A licence is issued to a person; if more people need it, more licences are what is needed.
- Reverse engineer, decompile or modify the software, except where law expressly permits it regardless of this term.
- Remove or alter licensing, signing or attribution mechanisms.
4. You are responsible for the networks you point it at
Packet Echo discovers devices, scans ports, queries switches over SNMP and captures traffic. You must have authorisation for every network you use it on. On a client network that means their permission; on an employer's network it means theirs. We cannot verify authorisation and do not attempt to, and you are solely responsible for obtaining it and for any consequence of not having it.
The SNMP features are read-only and the software does not change switch configuration. That does not make a scan unauthorised-proof: running one without permission may still breach a policy, a contract, or the law where you are.
5. Refunds
Perpetual licences are sold without refund once a key has been issued. We would rather say so plainly than bury it.
The reason is structural rather than commercial. Packet Echo does not check in on its own: once a key is applied, the software keeps working with no internet connection at all, and it only learns that a licence was withdrawn the next time somebody there checks for updates. A refunded licence can therefore continue working indefinitely on a machine that never checks again. There is no mechanism by which we could undo delivery, and we are not willing to add one — a program that reaches out on its own to verify itself is exactly the thing this product does not do.
So please try the free edition first. It is not time-limited and it is not a trial: it does network discovery, adapter tools and diagnostics without a licence, and it is there so you can decide before you pay.
Subscriptions (Packet Lens Web and the Packet Lens + Blueprint membership) can be cancelled at any time and are not refunded. When you cancel, access continues until the end of the month you have already paid for and does not renew after that. If something has gone wrong, write to us.
6. When we may withdraw a licence
We may withdraw a licence for a chargeback, for a payment reversed after a key was issued, or for use that breaches section 3. Withdrawing stops new activations and returns machines to the free edition when they next check for updates. Every withdrawal is recorded with a written reason.
We do not withdraw licences for any other purpose, and specifically not to force an upgrade or a price change.
7. Your data
What the software sees on your networks is not ours and is not transmitted. Theprivacy page sets out exactly what leaves your machine and when; it is two things, both of which you cause. That page forms part of this agreement.
8. No warranty
The software is provided “as is”, without warranty of any kind, express or implied, including merchantability, fitness for a particular purpose, and non-infringement.
Being direct about what this means for a diagnostic tool: Packet Echo reports what it observes on a network, and what it observes can be incomplete or misleading for reasons outside its control — a switch that does not answer, a VLAN it cannot see, a device that does not respond to discovery. Do not treat its output as a substitute for your own professional judgement. It is an instrument, not a conclusion.
9. Limitation of liability
To the maximum extent the law allows, our total liability arising out of or relating to this agreement is limited to the amount you paid for the licence in the twelve months before the claim.
We are not liable for indirect, incidental, special or consequential damages, for lost profits, lost data, or business interruption, even if we were advised such damages were possible.
Some jurisdictions do not allow the exclusion of certain warranties or the limitation of certain liabilities. Where that is so, the limitations above apply to the greatest extent permitted, and nothing here excludes liability that cannot lawfully be excluded.
10. Term
A perpetual licence lasts indefinitely unless withdrawn under section 6. A subscription lasts until cancelled. You may stop using the software at any time; if you do, sections 8, 9 and 11 continue to apply.
11. Governing law
This agreement is governed by the laws of the State of Oklahoma, United States, without regard to its conflict of law rules. The courts of Oklahoma have jurisdiction, except that either party may seek injunctive relief in any court of competent jurisdiction.
12. Changes
We may change this agreement for future purchases. The version you accepted when you bought applies to that purchase; a later change does not retroactively alter what you already paid for. Material changes will be dated at the top of this page.
13. Contact
Packet Haven · info@packetecho.net