It isn't very hard to make your own and, since it's your own, you can decide what peppers to use and control the heat. I've made my Sriracha with Tabascos, Thai peppers and a special one I call Sriracha of Death because I use Death Spirals to make it.
Here is a recipe that doesn't require fermentation:
Sriracha Recipe from Foolproof Preserving - America's Test Kitchen
Prep: 15 Minutes
Cook: 45 Minutes
Age: 1 Day
Yield: 2 Cups
Why this recipe works: Sriracha is a fiery-red Thai-American hot sauce fondly known
by its loyal followers as rooster sauce. Traditionally, Sriracha is made from a
fermented chile mash, which is a process that can take over a week. We wanted a
simple, streamlined version of rooster sauce we could make at home without the wait.
Our first test consisted of processing chiles, vinegar, water and garlic, along
with a bit of sugar and salt. We cooked the mixture down to a ketchup-like
consistency, which resulted in more of a chili-garlic paste than Sriracha. By
adjusting the ratio of liquid to chiles and garlic, we were on track to a pourable
hot sauce. We also swapped out white sugar in favor of brown; tasters preferred the
richer, deeper notes of the dark brown sugar. We were getting closer to a more
balanced hot sauce; however, we were missing the fermented flavor of the original.
To achieve the unique flavor, we whisked 2 tablespoons of fish sauce into the chile
mixture along with the sugar and salt. A quick simmer on the stovetop thickened the
Sriracha and allowed the flavors to meld. Passing the finished product through a
fine-mesh strainer gave us a smooth sauce.
Finally, we found it crucial to let the sauce sit for a day to develop its flavor
before serving. Although it's tempting to store this sauce in plastic squeeze
bottles, we found it better to store it in glass; the plastic can add off-flavors to
the sauce as it sits. This Sriracha cannot be processed for long term storage.
1 1/2 pounds red jalapeno or Fresno chiles, stemmed
1 1/4 cups distilled white vinegar
1/4 cup water
8 garlic cloves, peeled
2 tablespoons fish sauce
2 tablespoons packed dark brown sugar
5 teaspoons salt
1. Working in 2 batches, process jalapenos, vinegar, water and garlic in blender
until smooth, about 2 minutes. Transfer mixture to medium saucepan and whisk in fish
sauce, sugar and salt.
2. Bring mixture to a boil over high heat, then reduce heat to medium-low and simmer,
skimming any surface foam, until thickened, 18 to 20 minutes. Remove pan from heat
and let cool for 5 minutes.
3. Process mixture in blender until smooth, about 1 minute. Strain Sriracha through
fine-mesh strainer set over bowl, pressing on solids to extract as much sauce as
possible.
4. Using funnel and ladle, portion Sriracha into 2-cup glass bottle. Let sauce cool
to room temperature. Cover, refrigerate and let flavors mature for at least 1 day
before serving. Sriracha can be refrigerated for up to 6 months; flavor will mature
over time.