Kolabtree is the leading online freelance marketplace for Optical Engineering experts. Post your project, get bids, and hire qualified experts quickly and easily.
We take several measures to help you work with full confidence and peace of mind.
Keep your project private
Restrict who can see your project and send you proposals. Invite only specific freelancers to view your project.
NDAs and IP protection
Our T&C include a default confidentiality clause that protects your IP. Sign NDAs for added protection before disclosing project details.
Kolabtree ensures safety and security of your payments and personal information and project details. Kolabtree’s T&C includes a default confidentiality clause. You can also sign NDAs and custom agreements with freelancers for additional protection.
Post your project and receive quotes from relevant freelancers. You can also search for specific freelancers by expertise and invite them to your project. Discuss your project details with each freelancer before picking the one best expert.
We assure you of a 100% satisfaction guarantee, which means you only pay when you’re 100% satisfied with the work delivered. If you aren’t happy, we will refund 100% of your money.
You can choose to pay either a fixed or an hourly fee based on your scope of work. If you’re not sure how much your project costs, you can discuss with freelancers before arriving at a mutually agreed fee.
Kolabtree's terms and conditions prohibit freelancers from claiming ownership of intellectual property, and as a client, you are able to reinforce the message with additional communication, agreements or contracts.
Kolabtree is the place to go for professional help. Work was done promptly and efficiently. I would definitely seek the service again in my future projects
Maher AnousIndependent Plastic Surgeon, USA
A broad network of skilled people in many fields that is very hard to find elsewhere.
Roger SkagerwallTech entrepreneur, Sweden
The quality and quantity of accessible experts on Kolabtree is priceless.
Webster WatnikProfessor at California State University, USA
Contact experts directly
Speak directly with freelancers and explain your requirements.
100% satisfaction guaranteed
Pay only once work is delivered and you’re happy with it.
No upfront fees
No minimum commitment or contract required.
Flexible, secure payments
Pay a fixed or hourly fee. We hold your funds in escrow until you’re ready to pay.
Post project (Free)
Post your project publicly for all freelancers to view and send you proposals, or interact with specific freelancers privately.
Choose the best expert
Get bids from relevant experts. Interact freely with them before making a hire.
Share files, make audio/video calls and collaborate with your chosen expert.
Verify the project is complete to your satisfaction before paying the expert.