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SOS is the most intuitive source control user-interface we’ve tried. Our engineers are up and running in minutes rather than hours – without any training on the product whatsoever. While it is difficult to put quantitative numbers on a product like this, we are certain that our time spent in version control and release management has dropped in half since purchasing this tool.


Cliosoft’s SOS design data management platform is very useful for collaboration among our designers in Vietnam, the USA, China and Japan. It ensures that the design data is automatically synced up at all sites without any penalty on performance or engineering effort. Their SOS data management platform enables us to manage revision control and release management for all types of designs and complex design flows. It allows designers to take multiple snapshots of their designs and revert to a safer version in the event of a mistake or misinterpretation of the specs or guidance provided. The ease of use, robustness and seamless integration with EDA tools makes it very easy for designers to adopt the tool.


Cliosoft’s data management collaboration platform has helped us manage design data from digital, analog, and RF teams at multiple sites, improving design team productivity as we develop high-performance CMOS RF and mixed-signal semiconductors for the cellular industry. The universal data management adaptor looks very promising as a way to manage our Agilent ADS data for upcoming projects.

ON Semiconductor

With Cliosoft Visual Diff, I no longer have to wonder “What changed?”. I can see it. …


Our IC design group has been using Cliosoft SOS for the last couple of years. We initially adopted it for a large international collaboration to design the next generation of pixel readout chips for the inner layer of the ATLAS detector installed at CERN LHC. The experience was very positive and we are now gradually expanding Cliosoft use to other projects.Besides supporting (via GUI integration) Cadence Virtuoso both in its old CDBA and the new OA library format, we were also able to share digital design libraries in Mentor’s HDL designer and we are currently testing it on Synopsys Custom Designer. Besides the obvious advantage of being able to collaborate on a single project with groups from different parts of the world, even local projects benefit from it, not only because of versioning but also thanks to their latest feature -Visual Design Diff- which let us see changes in layout and schematic across different version directly in Virtuoso and Composer windows. This feature now works even outside the versioning system and let’s us spot in an instant changes (intentional and not) across any schematic and layout views, it saves time and frustration. Their support has been outstanding, by far the best among our EDA suppliers, we are usually the bottleneck in solving our support issue.

Berkeley Labs

Cliosoft’s SOS data management platform has helped us collaborate between designers located at multiple sites and improve the productivity of our design teams. Performance of SOS across sites has proved great even via slow WAN links thanks to local cache servers. Their tight integration with EDA tools such as Synopsys Custom Designer makes it easy for our design teams to use SOS and work together without stepping on each other’s toes. Their user interface is simple enough for novice users to quickly start using the tool and at the same time allow the advanced users to leverage the more powerful features of the tool. Robustness of the data management platform is essential for us and SOS fulfills all our expectations here. The distributed architecture of SOS ensures that there is no single point of failure and ensures high performance and flexibility needed to manage the handoffs of complex design flows including fine grained access control to our project data. Moreover, the quality and responsiveness of Cliosoft’s support team is outstanding.

Creative Chips

DALSA uses Cliosoft’s SOS Design Collaboration Platform to help us manage shared design data among design teams world-wide, during the active design process. The product has definitely helped our productivity as we design, develop, and manufacture digital imaging products and solutions, and the level of support from Cliosoft has been excellent. We’ve appreciated the ease of use delivered by Cliosoft’s tight integration with specific design tools in the past. The ability to manage data from any tool — a feature of the new Enterprise Edition — looks like something that will be of benefit to any design team.

Teledyne Dalso

We have been using Cliosoft’s SOS design management platform along with Cadence tools on the cloud services for the past few years. It works very well in the cloud and is natively integrated into Cadence Virtuoso which makes it very convenient to use. Using SOS makes it very easy for us to securely manage the design data used for our various products such as high-reliability data bus, motion control and solid-state power controller which are used in industries such as aerospace, defense and industrial applications. Their Visual Design Diff software helps us to easily distinguish between different versions of the same schematic or layout which often helps engineers realize the answer for the question “What changed?” Moreover, the quality and responsiveness of Cliosoft’s support team has also been outstanding.


At Elmos, we design and manufacture ISO26262 compliant SoCs for the automotive industry. Since 2014 we have been using Cliosoft’s SOS design management platform to collaborate between designers located at multiple sites and improve the productivity of our design teams. Robustness of the data management platform is essential for us and SOS fulfills our expectations here. We are excited to hear about Cliosoft’s work with TÜV SÜD to obtain TCL1 certification for SOS which we are using in our current and upcoming automotive designs.


After using Cliosoft`s SOS for many years we adopted the software also in our start-up team. It`s ease of use and high reliability make it a natural choice for us. Even though we are working now in a much smaller team we believe that data management is essential for the design-process and we are confident that SOS is the right choice for ustly integrated with EDA tools to accelerate design collaboration across multiple sites, revision control and design data management across the product life cycle.


Cliosoft’s SOS design management platform has helped us collaborate efficiently between designers located at multiple sites and improve the productivity of our design teams.

Cliosoft’s SOS design management collaboration platform has empowered our global design teams to improve productivity as we develop unique, patented semiconductor IP (Intellectual Property) cores for multimedia, processor and connectivity/communications applications across a wide range of established and emerging markets including mobile, consumer, automotive, enterprise, infrastructure, IoT and embedded electronics. The SOS platform is highly reliable with ease of use and tightly integrated with EDA tools to accelerate design collaboration across multiple sites, revision control and design data management across the product life cycle.

Imagination Technologies

We have been extremely satisfied and delighted with the SOS Software for Configuration Management from Cliosoft. It enabled the design teams to improve collaboration in designing Analog, Digital and Mixed-Signal chips with confidence and efficiency without compromising performance. The SOS platform has a very low adoption cycle, highly reliable, easy to use and with minimal setup required. It comes equipped with the necessary capabilities to facilitate revision control and design data management. The tight integration of the SOS platform with EDA design tools from vendors like Cadence, Synopsys, Mentor Graphics and Keysight Technologies is a great benefit and a big value-add in improving designers productivity


Apart from the obvious advantage of design groups from different parts of the world being able to collaborate on a single project by using the SOS hardware configuration platform, VDD enables us to manage ECOs better by letting us see changes in layout and schematic across different versions directly in Virtuoso and Composer windows.


Lattice Semiconductor prides itself on the ability to design ultra-low power, small form factor, customizable connectivity and control solutions for a variety of markets. We accelerate our customer’s time to market with products that offer innovative features and competitive differentiation. Cliosoft’s SOS provides a cohesive design environment for all types of digital, analog, RF and mixed-signal designs, helping us streamline and manage the design process across multiple design centers. SOS’ design management platform is simple, easy to use, yet powerful without compromising performance, providing us with the flexibility to customize our design methodology requirements. Cliosoft’s products are extremely robust and their tight integration with EDA tools provides a great benefit to designers.

Lattice Semiconductor

One tool I really loved to see was the Visual Design Diff, from Cliosoft. In my company we use XORs all the time in our verification flow, so it was a nice change to be able to see results so quickly, instead of waiting for a DRC run every time. Since my company has already been using SOS for over three years now (and me, personally, a lot longer), getting the tool was a no-brainer, because both of the opportunity to optimize our processes and Cliosoft and their support team are people I can count on when I have any questions.

We’ve found the architecture of the SOS data management system to be simple and powerful, while also offering plenty of customization options to fit our own design methodology. It has become fundamental to the quality of our products and the effectiveness of our designers.


In all my years in IT (almost 20) I’ve never received technical support from a company that is as good as what I’ve got from Cliosoft. I have used a bunch of different revision tools (RCS, RVS, SCCS, Subversion, Arch, Vss, SourceGear’s Vault, DesignSync), and though most are open source, support for the commercial ones doesn’t come close to what you provide.


My company has eight design offices distributed across America and Europe developing chips for Network Communications Ultra Low Power markets. I am responsible for the EDA Infrastructure within the company. We have used SOS as our standard configuration management solution for several years. We use both the standard SOS product and the version which integrates with the Cadence design environment. Configuration Management using SOS is of critical importance to our design processes. SOS works efficiently and effectively providing the features we need for a fraction of the cost of alternatives and with a fraction of the administrative overhead.

I have worked with many EDA vendors over the years and value good relationships. Some vendors are very difficult to work with and others very good. I have consistently found working with Cliosoft to be one of the best vendor relationships I have ever experienced. The quality and responsiveness of Cliosoft’s support operation, both commercially and technically, is second to none. Negotiating a contract was a straightforward and pleasant experience. We finished negotiations with confidence that we had an equitable deal, beneficial to both parties and have never felt let down. During the course of the contract Cliosoft met their commitments with friendliness and responsivness. Always doing what they say they will do, being flexible when we need them to be and never opportunistically sqeezing extra cash out of the deal.

Cliosoft’s technical support is of the same high standard. They respond very quickly to support queries with a genuine commitment to finding satisfactory solutions. They are also excellent at responding to feedback from their customer quickly and effectively. Several features in the current SOS product were introduced as a result of constructive dialogue between ourselves and Cliosoft support.

I continue to stand by my statement of several months ago: None of the many other EDA vendors we deal with does support better.

Cliosoft SOS works well for my company. I enjoy working with Cliosoft and hope to continue the relationship for a long time to come.


I put Cliosoft’s new “Visual Design Diff” tool in the “best” category. The color-based views of schematic and layout differences should help the designer with some “eye-popping” visual queues to the different versions. This is very helpful for solving human errors. (As in: “Uhh… It netlisted fine yesterday…”, “The last LVS wasn’t this bad” and “What did you change?”, etc.) This tool should reduce the drudgery of finding the change that you didn’t intend to make.


I was also impressed with Cliosoft SOS when I used it. The unbeatable SOS feature is its capability to version track *directories* as well as files. CVS poorly handles directories, you can’t revert or track groups of files other than by tagging them or remembering a given date. With SOS you can say ” give me directory xyz version 32″ and it will automatically recreate dir xyz with the files it contained at directory version 32. Directories are versioned controled in SOS, unlike in CVS. More on CVS limited capabilities with directories here (make sure you read the sections on renaming directories as well): https://cvsbook.red-bean.com/cvsbook.html#Removing_Directories I agree with Thomas on the quality of support and feature improvement with Cliosoft. I have seen features I requested being implemented. Not all vendors do that, and when you use CVS, it is pretty hard to convince the open source software community that you think a feature could be useful. The replies I go from them was ‘do it yourself – this is open source – and if a majority want it, then you can roll it in and support it, otherwise you have to maintain your own development branch’.

Nortel Networks

I have used Cliosoft’s SOS tool for the past five years I can tell you that this tool has made our lives a lot easier. My current project is a multi-site international project with several design centers in India. I believe managing such projects without the appropriate code revision tool is a recipe for disaster. I had used RCS prior to SOS but I have had no reason to look at any other tool since I started using SOS from Cliosoft. Cliosoft has done a great job of improving their tools too. The new release V3.02 allowed us to share our database from remote servers with reduced traffic and increased efficiency. I believe this tool is blessing for IC design projects and I will highly recommend it to anyone anytime. If you are running a IC design project do not look further than Cliosoft’s SOS V3.02.

Nortel Networks

I found Cliosoft’s SOS program to be an easy to use RCS and have used it to manage our design files for our recent microchip. Based on my tutorings of co-workers, it took on average 30 min for them to learn how to use the basics of SOS. Technical support from Cliosoft was great. All of my questions were handled promptly. One thing to note though, I’ve only used SOS to manage text files. I’ve never tried it on other types of file formats.

Nortel Networks

Cliosoft’s HUB platform has allowed our design teams to begin aggregating commonly used resources such as libraries and internal and third-party IPs for better use throughout our company. The user-centric perspective within the platform provides our engineers with the ability to easily share design data and track their usage. They can now also collaborate with other team members on various topics and have the HUB dashboard automatically document the discussion, updating with feedback or conclusions for easy reference. 


Spreadtrum uses Cliosoft’s SOS design management system to help designers collaborate efficiently between different design teams spread across multiple sites on complex analog, digital, RF, and mixed-signal designs. SOS provides a flexible platform for release management along with revision control to meet our complex design flow requirements. Fast user workspace creation by SOS for projects coupled with a tight integration to EDA tools such as Cadence® Virtuoso® platform makes it very easy for engineers to manage and share their design data efficiently across multiple sites even at a low network bandwidth. SOS is easy to use and enables designers to manage, reuse & tag their design data / IPs easily or to take a design snapshot whenever needed and label it appropriately.

Moreover, SOS also helps us optimize the project disk usage by providing tools such as the links-to-smart-cache capability and project views. In terms of security, SOS provides us with an easy but secure way of managing and sharing design data.

We have also been extremely happy with the support provided by Cliosoft in China and other countries where our designers use SOS.


Synaptics has been using Cliosoft SOS and SOS with DF2 interface for three years. During this time, the user pool has gone from 16 to 100. Almost 20% of the company has accessed Cliosoft SOS either through the SOS command line, SOS revision control of text files, SOS revision control via Cadence DF2, and/or the SOS web-based client. The SOS RCS tool has been used seamlessly by ASIC designers, software product and test, and firmware engineers on both Windows and Linux. We have had very few issues over the last three years, and what issues that we have had have been resolved quickly due to the seven days a week support that Cliosoft provides. I wish all my vendors offered the level of support that Cliosoft offers.

Moreover, SOS also helps us optimize the project disk usage by providing tools such as the links-to-smart-cache capability and project views. In terms of security, SOS provides us with an easy but secure way of managing and sharing design data.

We have also been extremely happy with the support provided by Cliosoft in China and other countries where our designers use SOS.


Cliosoft’s SOS design management platform has helped us collaborate efficiently between designers located at multiple sites and improve the productivity of our design teams. Synopsys is the number one provider of embedded non-volatile memory with antifuse technology and is used in a number of applications all over the world. It is important for us to manage the numerous design revisions and at the same time enable the design teams to work efficiently. The tight integration of Cliosoft SOS with Synopsys Custom Design Platform makes it easy for our engineers to develop the next generation memories and work together without stepping on each other’s toes. Robustness and ease of use of the data management platform is equally important to us and SOS fulfills all our expectations here. SOS provides high performance and the flexibility needed to manage the handoffs of complex design flows including fine grained access control to our project data. Moreover, the quality and responsiveness of Cliosoft’s support team is outstanding.


Of all the tools I have used I have always tried to put in place the methodology that meets those desired goals. The one tool I have had the most success with is SOS from Cliosoft! Yes, if you want to maintain 100’s of files this tool has a direct cost associated with it (100 files or less per project are supported by a free license). But, what many don’t understand is the indirect costs of not meeting the above three goals.

If you miss goal #1 then why bother doing any work on a Version Management System. If the tool and process are difficult to use or cumbersome to use; then engineers won’t use it. It has to be easy to use and scale during the life of your project.

If you miss goal #2 then you have missed a large benefit of Version Management. How do you know what you simulated was what you built? This question can not be asked after you have taped out that latest $1M ASIC.

If you miss goal #3 then you have lost the design history; what was tried and what was successful. It is difficult to have a maintainable design if you don’t have a history of the design creation.

Yes, RCS and CVS can do the version management work of Cliosoft’s SOS; in fact RCS is behind the scenes of SOS. Yes, you could build a GUI (or use one of the free ones) that is targeted to your flow. But, I would ask why when Cliosoft spent the effort to understand the hardware design process, hardware engineers likes and dislikes and mold it into a stable platform.

Cliosoft’s SOS had a client-server design which works cross platform. I use it in my office with WindowsNT and Linux. I have it on one client site using Solaris, HPUX, Windows95 and Windows2000. This client has several projects but the largest is ~10K files and represented ~12 design teams work over the last 5 years.

The latest version of SOS provides a method to have multiple remote servers which allows replication of the repository data. This would allow a company to have an East Coast and West Coast operations with data being shared real time. The remote servers allow the data to appear local to each office.

I have worked with groups that didn’t really think they needed version management and grumbled when Management made it a requirement. These same engineers embraced the system when they had to move back 12 days in time to recover a working design. The ability to move back in time or to a specific date is a real asset of SOS. This can be done with RCS and CVS but it takes a deeper understanding of the tools then just selecting the date in a GUI.

As a bonus, they have added several releases ago, is an issue tracking system. This allows you to attach issues to design files or directories. This feature can be customized with assigned task and notification. I find it very easy to use and explain to other engineers. Having issue tracking with version management just seems to make sense to me.

I would encourage you to look at Cliosoft’s web site and download the free version to give it a spin (https://www.cliosoft.com). I have been very happy with the support and feature improvements since my first introduction to Cliosoft over 5 years ago. I wish you luck and encourage you to think about my three stated goals above.

T2 Design

We have been using Cliosoft’s SOS design management platform on the cloud for past few years to manage all of our RF and Mixed-Signal Designs. With a native integration into Cadence Virtuoso platform, SOS enables us to securely manage our design with design team spread across multiple design centers. The platform is very easy to use and require very little or no CAD support which is very critical for small Company like Tagore who doesn’t have full-time CAD support Engineer. The support team, which we had to use few times in the beginning, is very knowledgeable and prompt in resolving issue.


We’ve found that a DM infrastructure, properly defined and executed, increases the likelihood of first-pass silicon success by decreasing mistakes caused by the use of obsolete data. Cliosoft’s new SOS platform should help us share data and greatly ease the task of moving personnel between projects. The Enterprise Edition’s ability to leverage PDKs and IP across multiple projects is very appealing. We look forward to exploring the potential to bring more of our design data under SOS control via the Universal DM Adaptor technology.


Our hardware group have been using Cliosoft for 3 years and haven’t had any major problems….SOS (Cliosoft) is much simpler and costs less than Clearcase. As well as using Cliosoft’s SOS to manage our design data for safer tape-outs, we needed a better way to track bugs, add and modify change requests and report bug resolutions. Cliosoft quickly answered our requests with a new module that provides us with a better way to track our bugs and their status.

Tenor Networks

To develop best-in-class solutions for the automotive industry, an ISO 26262-certified design management platform is a must. Last year we adopted Cliosoft’s SOS design management platform and found it to be a scalable and configurable solution that meets our requirements of minimizing network disk space usage and managing our complex design handoffs. The patented universal adapter in SOS also helps us to reduce the number of managed objects in our backend flow. We are very satisfied with the SOS design management platform and the support we have received in deploying it across all our digital, analog and mixed-signal designs.


SOS helped out tremendously. Everyone thinks very highly of it. It allowed our team of 6 engineers to work together without stepping on each others toes, and also increased communication and awareness. The graphical user interface was great for our novice users, yet did not limit the more advanced users who could also tap into more powerful features, including the command line interface and GUI customization features.



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