Gammastack Reviews 

There isn't a worst software development company than this. You can't imagine the kind of shit they make you go through after they sell you something. These guys are a nightmare to communicate, they won't respond to anyone. If they do, they will send you an invoice everytime you ask them to do something that's already in the contract. They are fraudulent folks and a useless bunch. Their sweepstakes code has so many bugs that you will lose a lifetime fixing them. Their min games are pathetic and I haven't seen worse graphics yet in my 25 years in the industry.

We bought a sweepstakes platform source code at some fixed cost agreed in the contract. These guys first of all agreed to all terms and conditions and once the payment was done, they stopped responding. They delivered 6 months late. Half baked product. Aws heavy code, just imagine paying $2000 of AWS usage monthly without platform going live. I recommend to never trust them and never do any business with them. You will always regret if you do. Now when I asked them to deploy the code locally on my PC, they are asking additional $20000, I have already paid them in full.

Working with GammaStack to build a new feature for our online platform has been a great experience. From the initial consultation to the final deployment, the process was professional and efficient. The quality of the work met our high standards, and the team was a pleasure to collaborate with. We are very happy with the results!

GammaStack has been a reliable partner throughout our collaboration. We worked together on casino platform projects, and they consistently demonstrated their ability to deliver on time while remaining flexible whenever adjustments were needed. Their professionalism and commitment to quality made the collaboration smooth and efficient. I would confidently recommend GammaStack as a partner for Gaming and Casino platform projects.

GammaStack is a very reliable partner. We have been working together on a challenging lottery project, and they have consistently demonstrated their ability to deliver on time while remaining flexible when needed. I highly recommend GammaStack as a partner for gaming projects.

Could not agree more with what has been shared below.

Timelines missed, cost increased at every turn, code not communicating with API, wallets not set up correctly, bonus engine was set to turnover not loses, I could go on for days!!!

Cost us in the hundreds of thousands and still working through 6 months after site was delivered.

I’m convinced Gammastack is a scam operation at this point.

Everyone else comments below echoes how we felt working with them

They charge exorbitantly only to deliver a bad gaming product.

Not worth the amount that you paid them. First they promised you everything and made contract as you wished. Then they gave you incomplete website and asked for extra which are very expensive even for adding simple ones. Then after getting paid, they don't care about the contract. Milestones that are included in the contract? They don't care. They will drag the project and write the codes that will have high aws cost.
If you are going to work with them, please have a proper contract and follow the contract milestone only and paid them only if the milestone is done completely.
Do not trust their words and pay them without any completion.

I have been alongside Gammastack for some time now. They are not producing any SEO friendly development and all of the code is failing Pagespeedinsights and lighthouse testing. They refuse to fix these issues.
They are a nightmare to communicate with, and promise the world but deliver peanuts. We are really not happy with these guys,

We hired GammaStack for two major projects worth over $250,000 - a casino platform and a set of seven original games. Unfortunately, what we received was buggy, inconsistent code, with major parts missing or nonfunctional.

After nine months of delays and minimal progress, we had to rebuild the entire codebase ourselves in order to launch. Although we had paid in full for the games, several of them did not work as promised. When we raised these concerns, we were told further work would require an additional $49,000 - more than double the outstanding balance. This was despite already having paid for broken or incomplete code. They wouldn't even have a call with us to ask questions so we could fix it ourselves.

Our experience with GammaStack was extremely disappointing. We hope other startups avoid the same mistake.