Open Source 360 Feedback Platform

A 360-degree feedback session is where an employee gets feedback from peers, managers, and if applicable, their direct reports. This gives you a better perspective on their performance and areas to develop. When you pair this with a self-assessment, it shows you where there might be gaps. Maybe you're being too hard on yourself in some areas, or too confident in others. Those mismatches are where the real growth opportunities are.

Blik uses cryptographic tokens embedded in unique URLs for each reviewer. The system architecture makes it technically impossible for administrators to trace feedback to specific individuals—even with direct database access. Unlike platforms with "anonymous mode" toggles, Blik's anonymity is enforced by design: no user accounts, no IP logging for reviewers, and no mapping between tokens and identities stored in the database.

Minimum requirements: 512MB RAM, 1 CPU core, 2GB storage. Recommended: 1GB+ RAM, 2 CPU cores, 10GB storage for production use. Blik runs on any system supporting Docker (Linux, macOS, Windows). Built with Python/Django—compatible with most Linux distributions. The Docker Compose setup includes PostgreSQL database or can connect to external database servers.

There are currently 4 default questionnaires to choose from; ranging from relatively quick & easy to very specific, detailed and advanced. You can also create your own questionnaires, but these 4 should get you started without having to think of all these questions up front.

Yes! The application comes with 4 default questionnaires for different roles and needs, and you can create your own with no restrictions. We have multiple types of answer modes like Likert scales, multiple choice, and free text. The questionnaires can contain multiple segments which work well on mobile devices too.

If you self host, you're definitely GDPR compliant. The hosted version of Blik is as close to GDPR compliance as we can get. We're hosted on Hetzner inside the EU. Our data policies can be found in our terms of service.

Key differences: (1) Open source vs proprietary: Blik is AGPL-licensed with zero licensing fees; competitors charge per-user subscriptions. (2) Self-hosted vs SaaS-only: Blik runs on your infrastructure; competitors require their hosted platforms. (3) Flat pricing vs per-user: Blik hosted plans charge €49-199/month regardless of usage; Lattice costs ~€18K/year for 50 people¹, Culture Amp ~€15K/year¹. (4) True anonymity: Blik's token-based system makes feedback technically untraceable; most competitors use "anonymous mode" toggles that admins can disable.

Blik supports almost all email providers. We allow you to use your own credentials or even your own Gmail address.

Yes, it's actually implicit. Your progress is saved on every step. Reviewers each have their own unique URL, and this allows them to come back later and continue where they left off safely and easily.

We try to keep anonymity in mind here, so we have a default (changeable) threshold of required answers in order to not be able to take any one response from someone directly. For super small teams you can just set this value to 1 and you will see all answers always. This setting also doesn't apply to managers, who I believe usually provide feedback which you can (should?) act upon.

A report gets triggered either by all invited members finalizing the questionnaire, or by an application admin who closes the report manually. The report itself shows an executive overview plus a detailed in-depth view of all the questions and the aggregated answers per group (self, peers, managers). A report can be generated at will even if some reviewers haven't finished answering all their questions yet. It takes whatever they've filled out so far and leaves the rest of the questions blank.

Probably yes, but we don't have a good import and haven't tested this. We didn't end up using any other software, so if you can provide us with samples from other tools, we can try to make this work.

No, you can't find Blik in the app stores, but our web based application works across all modern mobile devices. Benefit is that this also doesn't require installation or setups on user devices.

AGPL-3.0 (GNU Affero General Public License v3.0). This license grants unlimited rights to use, modify, and deploy Blik commercially or privately. Key requirement: if you host a modified version accessible over a network, you must make your source code changes available. This ensures community improvements (like LDAP integration or SSO support) benefit all users. For private internal deployments, no code sharing is required.

The repo's issues and discussion tabs are where the support will most likely be given and found. I try to keep things documented that are important too. Enterprise customers will receive priority updates and a more direct line if they prefer.

Yes, you can. The AGPL license allows you to white label this if you want to. Most things are pretty easy to modify or built in as variables already.

Any Django-compatible database is supported. I recommend using Postgres 15 or higher. The built in standalone Dockerfile uses SQLite to make things easier for anyone to get started from the get go.

This depends on my time and paid users as well as feedback from the community. I hope there will be many community updates, which eventually will lead to other maintainers as well. If you self-host you should probably check in every once in a while. There is no mechanism for this yet. For hosted customers, updates go live immediately after a few minutes when I push them.

Yes. Cycles are lightly implemented, meaning there is no enforcing of every reviewee having to be on the same cycle. There are no limits on active cycles and no problem having multiple people in different cycles simultaneously.

The report after the questionnaire is finished contains an executive overview that highlights gaps between how you see yourself and how others see you. It spots things like impostor syndrome or undervaluation of your own contributions. You'll see key strengths and weaknesses, plus a bar chart showing self vs others comparison. It also contains a radar chart with the different layers (self, peers, managers) averaged responses. The insights differ per person and questionnaire of course, but in general it should provide actionable insights.

Yes! Blik includes a full REST API with Bearer token authentication. You can programmatically manage review cycles, reviewees, questionnaires, and reports. The API also supports webhooks for real-time event notifications (cycle created, feedback submitted, report generated). Interactive OpenAPI documentation is available at https://app.blik360.com/api/v1/docs/. No usage limits, no integration fees—just standard authentication and full CRUD operations. View full API documentation →

There are two ways to invite reviewers. You can share a URL which generates unique tokens and ensures maximum anonymity. This is recommended method. Or you can send invites via email, which will randomly assign tokens. The trade off is that with invite links, you can't send email reminders. So pick the method that works best for your team.

Yes. You get a full account and organization JSON export. This makes it easy to back up your data or migrate to another system if you need to.

Just the employee count. The €49 plan is for up to 50 employees, and the €199 plan is for up to 200 employees. Everything else is the same. Bigger company equals bigger bill, but it's still a negligible amount when you have 200+ employees.

All data will be removed after 30 days. No exceptions. Make sure you export your data before canceling if you want to keep it.

Yes, there is a 14 day trial. Credit card is required to activate the trial though.