Google Cloud Pub/Sub vs. Klaviyo

If you want to stream high volumes of data, be it for ETL streaming or event sourcing, Google Cloud Pub/Sub is your go-to tool. It's easy to learn, easy to observe its metrics and scales with ease without additional configuration so if you have more producers of consumers, all you need to do is to deploy on k8s your solutions so that you can perform autoscaling on your pods to adjust to the data volume. The DLQ is also very transparent and easy to configure. Your code will have no logic whatsoever regarding orchestrating pubsub, you just plug and play. However, if you are not in the Google Cloud Pub/Sub environment, you might have trouble or be most likely unable to use it since I think it's a product of Google Cloud.

Klaviyo is a leader in the space, but I might recommend it to a colleague for its price point. There are other options that are more affordable and provide most of the tools Klaviyo offers. I also think it can be complicated to use for a new user.

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• With a pub/sub architecture the consumer is decoupled in time from the publisher i.e. if the consumer goes down, it can replay any events that occurred during its downtime.
• It also allows consumer to throttle and batch incoming data providing much needed flexibility while working with multiple types of data sources
• A simple and easy to use UI on cloud console for setup and debugging
• It enables event-driven architectures and asynchronous parallel processing, while improving performance, reliability and scalability

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• Klaviyo's template builder is very intuitive yet straightforward enough that an inexperienced user can catch on quickly.
• Their flow builder is also quite intuitive and allows us to build intricate, highly targeted flows.
• I appreciate their built-in compliance warnings & checks as they apply to opt-out methods, SMS compliance, and overall deliverability.

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• Would be nice if the queue could be extended beyond 7 days.
• We found it a bit tricky replay unacknowledged messages when needed.

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• Needs more visible critical notifications as we once exceeded our monthly email limit right during the Black Friday campaign. The notification was not visible enough for us to catch it on time, as a result, some emails scheduled to be sent over the weekend were never sent
• Better library of dynamic values available for use inside emails

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It serves all of our purposes in the most transparent way I can imagine, after seeing other message queueing providers, I can only attest to its quality.

Klaviyo is simply a great solution for e-com email marketing & customer relationship management:

1. User journey visibility: We can see our clients' customers on their individual user journeys (open email, site visits) to better understand and accommodate your customers.
2. Flow automation: Creating automated emails that follow up with new leads, those who abandoned carts, purchased.
3. Email design: So easy to use, and more friendly than some other visual builders that we've used.
4. Metrics visibility: We can see our clients' metrics very easily and adjust efforts accordingly.

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It is easy to create Google Cloud Pub/Sub topics from both Web Console and CLI commands.

Google Cloud Pub/Sub supports creation of one or more subscriptions.

By supporting a BigQuery Pub/Sub subscription to automatically write to a BigQuery table it simplifies development by avoiding implementation of a custom micro service for writes to BigQuery.

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The only reason why I did not give it a 10/10 is that it cannot distinguish purchases that came through subscription recharges instead of purchases that were driven directly by email sends. Other than that, the automation qualities, design features, and segmentation options make this an incredible email platform, and I am very happy with it

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I have never faced a single problem in 4 years.

It's very fast, can be even better if you use protobuf.

They have decent documentation, but you need to pay for support. We weren't able to answer all our questions with the documentation and didn't have time to setup support before we needed it so I can't give it a higher rating but I think it tends to be a bit slow unless you're a GCP enterprise support customer.

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Their support is always quick and we have recurring meetings with our advisor. they were great when we first started at walking us through the platform and helping us understand how to do the overall setup. They also have a wide variety of articles that cover must issues in a very clear manner that will get you out of a predicament really fast.

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Don't cut corners, do it right the first time, if you take your time to build everything the way you want it then it will run itself. The platform will help you increase revenue as long as you use the tools it provides. Don't be scared to ask questions, the support team will help you get to the next level

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Having used Amazon Web Services SNS & SQS I can say that even if the latter may offer more features, Google Cloud Pub/Sub is easier to use. On the other hand, usage of SNS & SQS as well as documentation and troubleshooting is easier with the AWS solution. Since we are not using GCP only for Pub/Sub the choice depends on other variables.

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Klaviyo's ability to really tackle the entire marketing contact ecosystem on one platform is what really won us over. The price for everything was competitive, not necessarily the cheapest but competitive, and the ability to see that data flow from every interaction was what was crucial to us. Additionally, Klaviyo is the core of our B2C business. We were not focused on anything other than how we interact with customers directly, and Klaviyo was a direct win for us. The one negative is Klaviyo's ability to work with our B2B side of our business, because it doesn't integrate with platforms like HubSpot. That is a massive downside, but the upside justified the investment.

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You can just plug in consumers at will and it will respond, there's no need for further configuration or introducing new concepts. You have a queue, if it's slow, you plug in more consumers to process more messages: simple as that.

• Increased Efficiency with reliable and Google managed services up all the time wit Disaster Recovery in place as well
• Definitely Lower costs being a cloud based solution and easier to setup
• Faster Project delivery and go to market plan for the business use cases basis this technology at the back end

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• Klaviyo brought our email channel to the top performing channel over Paid Ads several times (according to G Analytics), before Klaviyo Paid Ads were always top and the email channel struggled to even stay in 2nd place.
• Klaviyo did cost quite a bit more than our old email platform but the ROI was much higher so it paid for itself.
• Klaviyo implemented tools that allowed us to have a higher customer satisfaction with things like letting customers choose to receive less emails instead of unsubscribing.

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